diff --git a/js/public/Utility.h b/js/public/Utility.h
index 93ee414495e0..05309006e5e5 100644
--- a/js/public/Utility.h
+++ b/js/public/Utility.h
@@ -112,7 +112,11 @@ inline uint32_t GetThreadType(void) { return 0; }
 # if defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
 
 #ifdef JS_OOM_BREAKPOINT
+#  if defined(_MSC_VER)
+static MOZ_NEVER_INLINE void js_failedAllocBreakpoint() { __asm { }; }
+#  else
 static MOZ_NEVER_INLINE void js_failedAllocBreakpoint() { asm(""); }
+#  endif
 #define JS_OOM_CALL_BP_FUNC() js_failedAllocBreakpoint()
 #else
 #define JS_OOM_CALL_BP_FUNC() do {} while(0)