diff --git a/java/sdk_library.go b/java/sdk_library.go
index 6503e8b..43a340e 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -1295,6 +1295,24 @@
 	return android.Paths{jarPath.Path()}
 }
 
+// Get the apex name for module, "" if it is for platform.
+func getApexNameForModule(module android.Module) string {
+	if apex, ok := module.(android.ApexModule); ok {
+		return apex.ApexName()
+	}
+
+	return ""
+}
+
+// Check to see if the other module is within the same named APEX as this module.
+//
+// If either this or the other module are on the platform then this will return
+// false.
+func (module *SdkLibrary) withinSameApexAs(other android.Module) bool {
+	name := module.ApexName()
+	return name != "" && getApexNameForModule(other) == name
+}
+
 func (module *SdkLibrary) sdkJars(ctx android.BaseModuleContext, sdkVersion sdkSpec, headerJars bool) android.Paths {
 
 	// Only provide access to the implementation library if it is actually built.
@@ -1303,7 +1321,8 @@
 		//
 		// Only allow access to the implementation library in the following condition:
 		// * No sdk_version specified on the referencing module.
-		if sdkVersion.kind == sdkPrivate {
+		// * The referencing module is in the same apex as this.
+		if sdkVersion.kind == sdkPrivate || module.withinSameApexAs(ctx.Module()) {
 			if headerJars {
 				return module.HeaderJars()
 			} else {