diff --git a/dexpreopt/dexpreopt.go b/dexpreopt/dexpreopt.go
index 46e0f0a..18a38fb 100644
--- a/dexpreopt/dexpreopt.go
+++ b/dexpreopt/dexpreopt.go
@@ -102,6 +102,13 @@
 		return true
 	}
 
+	// Don't preopt system server jars that are updatable.
+	for _, p := range global.UpdatableSystemServerJars {
+		if _, jar := SplitApexJarPair(p); jar == module.Name {
+			return true
+		}
+	}
+
 	// If OnlyPreoptBootImageAndSystemServer=true and module is not in boot class path skip
 	// Also preopt system server jars since selinux prevents system server from loading anything from
 	// /data. If we don't do this they will need to be extracted which is not favorable for RAM usage
@@ -537,6 +544,16 @@
 	}
 }
 
+// Expected format for apexJarValue = <apex name>:<jar name>
+func SplitApexJarPair(apexJarValue string) (string, string) {
+	var apexJarPair []string = strings.SplitN(apexJarValue, ":", 2)
+	if apexJarPair == nil || len(apexJarPair) != 2 {
+		panic(fmt.Errorf("malformed apexJarValue: %q, expected format: <apex>:<jar>",
+			apexJarValue))
+	}
+	return apexJarPair[0], apexJarPair[1]
+}
+
 func contains(l []string, s string) bool {
 	for _, e := range l {
 		if e == s {
diff --git a/java/dexpreopt_config.go b/java/dexpreopt_config.go
index 15f11e1..4747c64 100644
--- a/java/dexpreopt_config.go
+++ b/java/dexpreopt_config.go
@@ -15,7 +15,6 @@
 package java
 
 import (
-	"fmt"
 	"path/filepath"
 	"strings"
 
@@ -66,16 +65,6 @@
 var dexpreoptGlobalConfigKey = android.NewOnceKey("DexpreoptGlobalConfig")
 var dexpreoptTestGlobalConfigKey = android.NewOnceKey("TestDexpreoptGlobalConfig")
 
-// Expected format for apexJarValue = <apex name>:<jar name>
-func splitApexJarPair(apexJarValue string) (string, string)  {
-	var apexJarPair []string = strings.SplitN(apexJarValue, ":", 2)
-	if apexJarPair == nil || len(apexJarPair) != 2 {
-		panic(fmt.Errorf("malformed apexJarValue: %q, expected format: <apex>:<jar>",
-			apexJarValue))
-	}
-	return apexJarPair[0], apexJarPair[1]
-}
-
 // systemServerClasspath returns the on-device locations of the modules in the system server classpath.  It is computed
 // once the first time it is called for any ctx.Config(), and returns the same slice for all future calls with the same
 // ctx.Config().
@@ -89,9 +78,9 @@
 				filepath.Join("/system/framework", m+".jar"))
 		}
 		for _, m := range global.UpdatableSystemServerJars {
-			apex, jar := splitApexJarPair(m)
+			apex, jar := dexpreopt.SplitApexJarPair(m)
 			systemServerClasspathLocations = append(systemServerClasspathLocations,
-				filepath.Join("/apex", apex, "javalib", jar + ".jar"))
+				filepath.Join("/apex", apex, "javalib", jar+".jar"))
 		}
 		return systemServerClasspathLocations
 	})