1 files changed, 1 insertions, 1 deletions
diff --git a/rational.c b/rational.c
index 8d30118..fcad116 100644
--- a/rational.c
+++ b/rational.c
@@ -5,7 +5,7 @@
   which is written in ruby.
 */
 
-#include "ruby/impl/config.h"
+#include "ruby/internal/config.h"
 
 #include <ctype.h>
 #include <float.h>