1 files changed, 1 insertions, 1 deletions
diff --git a/math.c b/math.c
index bd02849002..d0c2eee487 100644
--- a/math.c
+++ b/math.c
@@ -10,7 +10,7 @@
 
 **********************************************************************/
 
-#include "ruby.h"
+#include "ruby/ruby.h"
 #include <math.h>
 #include <errno.h>