diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index 6e7689e901f5..5571fc05e37e 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -4924,6 +4924,12 @@ JS_GetFunctionId(JSFunction *fun)
     return fun->atom();
 }
 
+JS_PUBLIC_API(JSString *)
+JS_GetFunctionDisplayId(JSFunction *fun)
+{
+    return fun->displayAtom();
+}
+
 JS_PUBLIC_API(unsigned)
 JS_GetFunctionFlags(JSFunction *fun)
 {
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index da7a6689a801..c8ab0f09c61b 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -4974,6 +4974,16 @@ JS_GetFunctionObject(JSFunction *fun);
 extern JS_PUBLIC_API(JSString *)
 JS_GetFunctionId(JSFunction *fun);
 
+/*
+ * Return a function's display name. This is the defined name if one was given
+ * where the function was defined, or it could be an inferred name by the JS
+ * engine in the case that the function was defined to be anonymous. This can
+ * still return NULL if a useful display name could not be inferred. The same
+ * restrictions on rooting as those in JS_GetFunctionId apply.
+ */
+extern JS_PUBLIC_API(JSString *)
+JS_GetFunctionDisplayId(JSFunction *fun);
+
 /*
  * Return JSFUN_* flags for fun.
  */