Index: src/third_party/mozjs-60/platform/x86_64/openbsd/build/js-confdefs.h
--- src/third_party/mozjs-60/platform/x86_64/openbsd/build/js-confdefs.h.orig
+++ src/third_party/mozjs-60/platform/x86_64/openbsd/build/js-confdefs.h
@@ -54,7 +54,7 @@
 #define JS_POSIX_NSPR 1
 #define JS_PUNBOX64 1
 #define JS_STANDALONE 1
-#define MALLOC_H <malloc_np.h>
+#define MALLOC_H <stdlib.h>
 #define MALLOC_USABLE_SIZE_CONST_PTR const
 #define MOZILLA_UAVERSION "60.0"
 #define MOZILLA_VERSION "60.3.0"
