diff --git a/ext/fiddle/fiddle.h b/ext/fiddle/fiddle.h
index 684b943d309ea5..5a31a4bdb853e6 100644
--- a/ext/fiddle/fiddle.h
+++ b/ext/fiddle/fiddle.h
@@ -118,7 +118,7 @@
 #define TYPE_UINT   -TYPE_INT
 #define TYPE_LONG  5
 #define TYPE_ULONG  -TYPE_LONG
-#if HAVE_LONG_LONG
+#ifdef HAVE_LONG_LONG
 #define TYPE_LONG_LONG 6
 #define TYPE_ULONG_LONG -TYPE_LONG_LONG
 #endif