1 files changed, 2 insertions, 1 deletions
diff --git a/mjit.c b/mjit.c
index b7240243f0..8f400f5f08 100644
--- a/mjit.c
+++ b/mjit.c
@@ -11,9 +11,10 @@
 
 // To share variables privately, include mjit_worker.c instead of linking.
 
+#include "ruby/internal/config.h" // defines USE_MJIT
+
 #if USE_MJIT
 
-#include "ruby/internal/config.h"
 #include "constant.h"
 #include "id_table.h"
 #include "internal.h"