1 files changed, 1 insertions, 1 deletions
diff --git a/pack.c b/pack.c
index 3c63d64ab5..7f56066f96 100644
--- a/pack.c
+++ b/pack.c
@@ -9,7 +9,7 @@
 
 **********************************************************************/
 
-#include "ruby/config.h"
+#include "ruby/3/config.h"
 
 #include <ctype.h>
 #include <errno.h>