1 files changed, 1 insertions, 1 deletions
diff --git a/bignum.c b/bignum.c
index b24259e4d2..d24e8ae702 100644
--- a/bignum.c
+++ b/bignum.c
@@ -10,7 +10,7 @@
 
 **********************************************************************/
 
-#include "ruby.h"
+#include "ruby/ruby.h"
 
 #include <math.h>
 #include <float.h>