diff --git a/apex/apex_test.go b/apex/apex_test.go
index 12201a3..83eb56a 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -4526,9 +4526,10 @@
 		ctx := testDexpreoptWithApexes(t, bp, "", transform)
 		checkBootDexJarPath(t, ctx, ".intermediates/myapex.deapexer/android_common/deapexer/javalib/libfoo.jar")
 
-		// Make sure that the dex file from the prebuilt_apex does NOT contribute to the hiddenapi index
-		// file.
-		checkHiddenAPIIndexInputs(t, ctx, ``)
+		// Make sure that the dex file from the prebuilt_apex contributes to the hiddenapi index file.
+		checkHiddenAPIIndexInputs(t, ctx, `
+.intermediates/libfoo/android_common_myapex/hiddenapi/index.csv
+`)
 	})
 
 	t.Run("prebuilt with source library preferred", func(t *testing.T) {
@@ -4599,9 +4600,10 @@
 		ctx := testDexpreoptWithApexes(t, bp, "", transform)
 		checkBootDexJarPath(t, ctx, ".intermediates/myapex.deapexer/android_common/deapexer/javalib/libfoo.jar")
 
-		// Make sure that the dex file from the prebuilt_apex does NOT contribute to the hiddenapi index
-		// file.
-		checkHiddenAPIIndexInputs(t, ctx, ``)
+		// Make sure that the dex file from the prebuilt_apex contributes to the hiddenapi index file.
+		checkHiddenAPIIndexInputs(t, ctx, `
+.intermediates/prebuilt_libfoo/android_common_myapex/hiddenapi/index.csv
+`)
 	})
 
 	t.Run("prebuilt with source apex preferred", func(t *testing.T) {
@@ -4698,9 +4700,10 @@
 		ctx := testDexpreoptWithApexes(t, bp, "", transform)
 		checkBootDexJarPath(t, ctx, ".intermediates/myapex.deapexer/android_common/deapexer/javalib/libfoo.jar")
 
-		// Make sure that the dex file from the prebuilt_apex does NOT contribute to the hiddenapi index
-		// file.
-		checkHiddenAPIIndexInputs(t, ctx, ``)
+		// Make sure that the dex file from the prebuilt_apex contributes to the hiddenapi index file.
+		checkHiddenAPIIndexInputs(t, ctx, `
+.intermediates/prebuilt_libfoo/android_common_prebuilt_myapex/hiddenapi/index.csv
+`)
 	})
 }
 
diff --git a/java/hiddenapi.go b/java/hiddenapi.go
index 66d9ca0..069595e 100644
--- a/java/hiddenapi.go
+++ b/java/hiddenapi.go
@@ -144,12 +144,7 @@
 		return dexJar
 	}
 
-	// More than one library with the same classes may need to be encoded but only one should be
-	// used as a source of information for hidden API processing otherwise it will result in
-	// duplicate entries in the files.
-	if primary {
-		h.hiddenAPIExtractInformation(ctx, dexJar, implementationJar)
-	}
+	h.hiddenAPIExtractInformation(ctx, dexJar, implementationJar, primary)
 
 	if !h.annotationsOnly {
 		hiddenAPIJar := android.PathForModuleOut(ctx, "hiddenapi", name+".jar").OutputPath
@@ -169,7 +164,18 @@
 //
 // It also makes the dex jar available for use when generating the
 // hiddenAPISingletonPathsStruct.stubFlags.
-func (h *hiddenAPI) hiddenAPIExtractInformation(ctx android.ModuleContext, dexJar, classesJar android.Path) {
+func (h *hiddenAPI) hiddenAPIExtractInformation(ctx android.ModuleContext, dexJar, classesJar android.Path, primary bool) {
+	if !h.active {
+		return
+	}
+
+	// More than one library with the same classes may need to be encoded but only one should be
+	// used as a source of information for hidden API processing otherwise it will result in
+	// duplicate entries in the files.
+	if !primary {
+		return
+	}
+
 	stubFlagsCSV := hiddenAPISingletonPaths(ctx).stubFlags
 
 	flagsCSV := android.PathForModuleOut(ctx, "hiddenapi", "flags.csv")
diff --git a/java/java.go b/java/java.go
index dfbcd6f..d194ff7 100644
--- a/java/java.go
+++ b/java/java.go
@@ -2917,6 +2917,9 @@
 	j.exportAidlIncludeDirs = android.PathsForModuleSrc(ctx, j.properties.Aidl.Export_include_dirs)
 
 	if ctx.Device() {
+		configurationName := j.BaseModuleName()
+		primary := j.Prebuilt().UsePrebuilt()
+
 		// If this is a variant created for a prebuilt_apex then use the dex implementation jar
 		// obtained from the associated deapexer module.
 		ai := ctx.Provider(android.ApexInfoProvider).(android.ApexInfo)
@@ -2930,8 +2933,10 @@
 
 			// Get the path of the dex implementation jar from the `deapexer` module.
 			di := ctx.OtherModuleProvider(deapexerModule, android.DeapexerProvider).(android.DeapexerInfo)
-			j.dexJarFile = di.PrebuiltExportPath(j.BaseModuleName(), ".dexjar")
-			if j.dexJarFile == nil {
+			if dexOutputPath := di.PrebuiltExportPath(j.BaseModuleName(), ".dexjar"); dexOutputPath != nil {
+				j.dexJarFile = dexOutputPath
+				j.hiddenAPI.hiddenAPIExtractInformation(ctx, dexOutputPath, outputFile, primary)
+			} else {
 				// This should never happen as a variant for a prebuilt_apex is only created if the
 				// prebuilt_apex has been configured to export the java library dex file.
 				ctx.ModuleErrorf("internal error: no dex implementation jar available from prebuilt_apex %q", deapexerModule.Name())
@@ -2961,9 +2966,6 @@
 				return
 			}
 
-			configurationName := j.BaseModuleName()
-			primary := j.Prebuilt().UsePrebuilt()
-
 			// Hidden API CSV generation and dex encoding
 			dexOutputFile = j.hiddenAPIExtractAndEncode(ctx, configurationName, primary, dexOutputFile, outputFile,
 				proptools.Bool(j.dexProperties.Uncompress_dex))