diff --git a/gc-api.h b/gc-api.h
index 9bcd69d70..67169a99b 100644
--- a/gc-api.h
+++ b/gc-api.h
@@ -3,6 +3,7 @@
 
 #include "gc-config.h"
 #include "gc-assert.h"
+#include "gc-inline.h"
 #include "gc-ref.h"
 #include "gc-edge.h"