1 files changed, 1 insertions, 1 deletions
diff --git a/debug.c b/debug.c
index 1087eb7dd5..9b5dc016ab 100644
--- a/debug.c
+++ b/debug.c
@@ -9,7 +9,7 @@
 
 **********************************************************************/
 
-#include "ruby/config.h"
+#include "ruby/3/config.h"
 
 #include <stdio.h>