diff --git a/dexpreopt/config.go b/dexpreopt/config.go
index 9215eff..f38d892 100644
--- a/dexpreopt/config.go
+++ b/dexpreopt/config.go
@@ -44,9 +44,10 @@
 	ProductUpdatableBootModules   []string
 	ProductUpdatableBootLocations []string
 
-	SystemServerJars []string // jars that form the system server
-	SystemServerApps []string // apps that are loaded into system server
-	SpeedApps        []string // apps that should be speed optimized
+	SystemServerJars          []string // jars that form the system server
+	SystemServerApps          []string // apps that are loaded into system server
+	UpdatableSystemServerJars []string // jars within apex that are loaded into system server
+	SpeedApps                 []string // apps that should be speed optimized
 
 	PreoptFlags []string // global dex2oat flags that should be used if no module-specific dex2oat flags are specified
 
@@ -285,6 +286,7 @@
 		ProductUpdatableBootLocations:      nil,
 		SystemServerJars:                   nil,
 		SystemServerApps:                   nil,
+		UpdatableSystemServerJars:          nil,
 		SpeedApps:                          nil,
 		PreoptFlags:                        nil,
 		DefaultCompilerFilter:              "",
diff --git a/java/dexpreopt_config.go b/java/dexpreopt_config.go
index a6661b3..15f11e1 100644
--- a/java/dexpreopt_config.go
+++ b/java/dexpreopt_config.go
@@ -15,6 +15,7 @@
 package java
 
 import (
+	"fmt"
 	"path/filepath"
 	"strings"
 
@@ -65,6 +66,16 @@
 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().
@@ -77,6 +88,11 @@
 			systemServerClasspathLocations = append(systemServerClasspathLocations,
 				filepath.Join("/system/framework", m+".jar"))
 		}
+		for _, m := range global.UpdatableSystemServerJars {
+			apex, jar := splitApexJarPair(m)
+			systemServerClasspathLocations = append(systemServerClasspathLocations,
+				filepath.Join("/apex", apex, "javalib", jar + ".jar"))
+		}
 		return systemServerClasspathLocations
 	})
 }