diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index 6f66f4c8f..69a3ba2ac 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -483,6 +483,11 @@ JS_DestroyContext(JSContext* cx)
     DestroyContext(cx);
 }
 
+JS_PUBLIC_API(JSRuntime*)
+JS_GetRuntime(JSContext* cx) {
+    return cx->runtime();
+}
+
 static JS_CurrentEmbedderTimeFunction currentEmbedderTimeFunction;
 
 JS_PUBLIC_API(void)
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 56c54dcd2..5cdfd958e 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -995,6 +995,9 @@ JS_NewContext(uint32_t maxbytes,
 extern JS_PUBLIC_API(void)
 JS_DestroyContext(JSContext* cx);
 
+extern JS_PUBLIC_API(JSRuntime*)
+JS_GetRuntime(JSContext* cx);
+
 typedef double (*JS_CurrentEmbedderTimeFunction)();
 
 /**