1 files changed, 2 insertions, 1 deletions
diff --git a/bignum.c b/bignum.c
index b4e9148f42..7955fe22bd 100644
--- a/bignum.c
+++ b/bignum.c
@@ -10,9 +10,10 @@
 
 **********************************************************************/
 
+#include "ruby.h"
+
 #include <math.h>
 #include <ctype.h>
-#include "ruby.h"
 
 VALUE rb_cBignum;