$OpenBSD$

index cf79b1e..a1f5c6b 100644
--- js/src/js-config.h.in.orig	Fri Feb 20 15:40:37 2015
+++ js/src/js-config.h.in	Fri Feb 20 15:40:37 2015
@@ -28,6 +28,15 @@
    entirely too much GC.  */
 #undef JS_GC_ZEAL
 
+/* Define to 1 if SpiderMonkey should use Incremental GC. */
+#undef JSGC_INCREMENTAL
+
+/* Define to 1 if SpiderMonkey should use Generational GC. */
+#undef JSGC_GENERATIONAL
+
+/* Define to 1 if SpiderMonkey should use Exact Rooting. */
+#undef JSGC_USE_EXACT_ROOTING
+
 /* Define to 1 if the <endian.h> header is present and
    useable.  See jscpucfg.h.  */
 #undef JS_HAVE_ENDIAN_H