diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index d582cb7..c6ce799 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -65,6 +65,7 @@
         "android.server.app.flags-aconfig-java",
         "android.service.autofill.flags-aconfig-java",
         "android.service.chooser.flags-aconfig-java",
+        "android.service.compat.flags-aconfig-java",
         "android.service.controls.flags-aconfig-java",
         "android.service.dreams.flags-aconfig-java",
         "android.service.notification.flags-aconfig-java",
@@ -863,6 +864,21 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
 
+aconfig_declarations {
+    name: "android.service.compat.flags-aconfig",
+    package: "com.android.server.compat",
+    container: "system",
+    srcs: [
+        "services/core/java/com/android/server/compat/*.aconfig",
+    ],
+}
+
+java_aconfig_library {
+    name: "android.service.compat.flags-aconfig-java",
+    aconfig_declarations: "android.service.compat.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
+
 // Multi user
 aconfig_declarations {
     name: "android.multiuser.flags-aconfig",
diff --git a/services/core/java/com/android/server/compat/PlatformCompat.java b/services/core/java/com/android/server/compat/PlatformCompat.java
index a9fe8cb..8d64383 100644
--- a/services/core/java/com/android/server/compat/PlatformCompat.java
+++ b/services/core/java/com/android/server/compat/PlatformCompat.java
@@ -242,7 +242,8 @@
         boolean enabled = true;
         final int userId = UserHandle.getUserId(uid);
         for (String packageName : packages) {
-            final var appInfo = getApplicationInfo(packageName, userId);
+            final var appInfo =
+                fixTargetSdk(getApplicationInfo(packageName, userId), uid);
             enabled &= isChangeEnabledInternal(changeId, appInfo);
         }
         return enabled;
@@ -261,7 +262,8 @@
         boolean enabled = true;
         final int userId = UserHandle.getUserId(uid);
         for (String packageName : packages) {
-            final var appInfo = getApplicationInfo(packageName, userId);
+            final var appInfo =
+                fixTargetSdk(getApplicationInfo(packageName, userId), uid);
             enabled &= isChangeEnabledInternalNoLogging(changeId, appInfo);
         }
         return enabled;
@@ -504,6 +506,15 @@
                 packageName, 0, Process.myUid(), userId);
     }
 
+    private ApplicationInfo fixTargetSdk(ApplicationInfo appInfo, int uid) {
+        // b/282922910 - we don't want apps sharing system uid and targeting
+        // older target sdk to impact all system uid apps
+        if (Flags.systemUidTargetSystemSdk() && uid == Process.SYSTEM_UID) {
+            appInfo.targetSdkVersion = Build.VERSION.SDK_INT;
+        }
+        return appInfo;
+    }
+
     private void killPackage(String packageName) {
         int uid = LocalServices.getService(PackageManagerInternal.class).getPackageUid(packageName,
                 0, UserHandle.myUserId());
diff --git a/services/core/java/com/android/server/compat/platform_compat_flags.aconfig b/services/core/java/com/android/server/compat/platform_compat_flags.aconfig
new file mode 100644
index 0000000..fb32323
--- /dev/null
+++ b/services/core/java/com/android/server/compat/platform_compat_flags.aconfig
@@ -0,0 +1,10 @@
+package: "com.android.server.compat"
+container: "system"
+
+flag {
+    name: "system_uid_target_system_sdk"
+    namespace: "app_compat"
+    description: "Compat framework feature flag for forcing all system uid apps to target system sdk"
+    bug: "29702703"
+    is_fixed_read_only: true
+}
diff --git a/services/tests/servicestests/src/com/android/server/compat/PlatformCompatTest.java b/services/tests/servicestests/src/com/android/server/compat/PlatformCompatTest.java
index 9df7a36..1d07540 100644
--- a/services/tests/servicestests/src/com/android/server/compat/PlatformCompatTest.java
+++ b/services/tests/servicestests/src/com/android/server/compat/PlatformCompatTest.java
@@ -20,6 +20,7 @@
 
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.anyInt;
+import static org.mockito.Mockito.anyLong;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.verify;
@@ -33,6 +34,11 @@
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManagerInternal;
 import android.os.Build;
+import android.os.Process;
+
+import android.platform.test.annotations.DisableFlags;
+import android.platform.test.annotations.EnableFlags;
+import android.platform.test.flag.junit.SetFlagsRule;
 
 import androidx.test.runner.AndroidJUnit4;
 
@@ -43,6 +49,7 @@
 import com.android.server.LocalServices;
 
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -55,6 +62,8 @@
 public class PlatformCompatTest {
     private static final String PACKAGE_NAME = "my.package";
 
+    @Rule public final SetFlagsRule mSetFlagsRule = new SetFlagsRule();
+
     @Mock
     private Context mContext;
     @Mock
@@ -441,4 +450,79 @@
         assertThat(mPlatformCompat.isChangeEnabled(3L, systemAppInfo)).isTrue();
         verify(mChangeReporter).reportChange(123, 3L, ChangeReporter.STATE_ENABLED, true, false);
     }
+
+    @DisableFlags(Flags.FLAG_SYSTEM_UID_TARGET_SYSTEM_SDK)
+    @Test
+    public void testSharedSystemUidFlagOff() throws Exception {
+        testSharedSystemUid(false);
+    }
+
+    @EnableFlags(Flags.FLAG_SYSTEM_UID_TARGET_SYSTEM_SDK)
+    @Test
+    public void testSharedSystemUidFlagOn() throws Exception {
+        testSharedSystemUid(true);
+    }
+
+    private void testSharedSystemUid(Boolean expectSystemUidTargetSystemSdk) throws Exception {
+        final String systemUidPackageNameTargetsR = "systemuid.package1";
+        final String systemUidPackageNameTargetsQ = "systemuid.package2";
+        final String nonSystemUidPackageNameTargetsR = "nonsystemuid.package1";
+        final String nonSystemUidPackageNameTargetsQ = "nonsystemuid.package2";
+        final int nonSystemUid = 123;
+
+        mCompatConfig =
+                CompatConfigBuilder.create(mBuildClassifier, mContext)
+                        .addEnableSinceSdkChangeWithId(Build.VERSION_CODES.R, 1L)
+                        .build();
+        mCompatConfig.forceNonDebuggableFinalForTest(true);
+        mPlatformCompat =
+                new PlatformCompat(mContext, mCompatConfig, mBuildClassifier, mChangeReporter);
+
+        ApplicationInfo systemUidAppInfo1 = ApplicationInfoBuilder.create()
+            .withPackageName(systemUidPackageNameTargetsR)
+            .withUid(Process.SYSTEM_UID)
+            .withTargetSdk(Build.VERSION_CODES.R)
+            .build();
+        when(mPackageManagerInternal.getApplicationInfo(
+                 eq(systemUidPackageNameTargetsR), anyLong(), anyInt(), anyInt()))
+            .thenReturn(systemUidAppInfo1);
+
+        ApplicationInfo systemUidAppInfo2 = ApplicationInfoBuilder.create()
+            .withPackageName(systemUidPackageNameTargetsQ)
+            .withUid(Process.SYSTEM_UID)
+            .withTargetSdk(Build.VERSION_CODES.Q)
+            .build();
+        when(mPackageManagerInternal.getApplicationInfo(
+                 eq(systemUidPackageNameTargetsQ), anyLong(), anyInt(), anyInt()))
+            .thenReturn(systemUidAppInfo2);
+
+        ApplicationInfo nonSystemUidAppInfo1 = ApplicationInfoBuilder.create()
+            .withPackageName(nonSystemUidPackageNameTargetsR)
+            .withUid(nonSystemUid)
+            .withTargetSdk(Build.VERSION_CODES.R)
+            .build();
+        when(mPackageManagerInternal.getApplicationInfo(
+                 eq(nonSystemUidPackageNameTargetsR), anyLong(), anyInt(), anyInt()))
+            .thenReturn(nonSystemUidAppInfo1);
+
+        ApplicationInfo nonSystemUidAppInfo2 = ApplicationInfoBuilder.create()
+            .withPackageName(nonSystemUidPackageNameTargetsQ)
+            .withUid(nonSystemUid)
+            .withTargetSdk(Build.VERSION_CODES.Q)
+            .build();
+        when(mPackageManagerInternal.getApplicationInfo(
+                 eq(nonSystemUidPackageNameTargetsQ), anyLong(), anyInt(), anyInt()))
+            .thenReturn(nonSystemUidAppInfo2);
+
+        when(mPackageManager.getPackagesForUid(eq(Process.SYSTEM_UID)))
+            .thenReturn(new String[] {systemUidPackageNameTargetsR, systemUidPackageNameTargetsQ});
+        when(mPackageManager.getPackagesForUid(eq(nonSystemUid)))
+            .thenReturn(new String[] {
+                            nonSystemUidPackageNameTargetsR, nonSystemUidPackageNameTargetsQ
+                        });
+
+        assertThat(mPlatformCompat.isChangeEnabledByUid(1L, Process.SYSTEM_UID))
+            .isEqualTo(expectSystemUidTargetSystemSdk);
+        assertThat(mPlatformCompat.isChangeEnabledByUid(1L, nonSystemUid)).isFalse();
+    }
 }