--- a/media/libcubeb/src/cubeb_opensl.c
+++ b/media/libcubeb/src/cubeb_opensl.c
@@ -180,18 +180,22 @@ convert_stream_type_to_sl_stream(cubeb_s
   default:
     return 0xFFFFFFFF;
   }
 }
 #endif
 
 static void opensl_destroy(cubeb * ctx);
 
+
 #if defined(__ANDROID__)
 
+// B2G header file still contain the required function declarations.
+#ifndef MOZ_WIDGET_GONK
+
 #if (__ANDROID_API__ >= ANDROID_VERSION_LOLLIPOP)
 typedef int (system_property_get)(const char*, char*);
 
 static int
 __system_property_get(const char* name, char* value)
 {
   void* libc = dlopen("libc.so", RTLD_LAZY);
   if (!libc) {
@@ -204,16 +208,18 @@ static int
   if (func) {
     ret = func(name, value);
   }
   dlclose(libc);
   return ret;
 }
 #endif
 
+#endif // MOZ_WIDGET_GONK
+
 static int
 get_android_version(void)
 {
   char version_string[PROP_VALUE_MAX];
 
   memset(version_string, 0, PROP_VALUE_MAX);
 
   int len = __system_property_get("ro.build.version.sdk", version_string);