1 files changed, 1 insertions, 1 deletions

diff --git a/math.c b/math.c
index 163efde2ef..f422609f18 100644
--- a/math.c
+++ b/math.c
@@ -12,7 +12,7 @@
 
 #include "ruby.h"
 #include <math.h>
-#include <sys/errno.h>
+#include <errno.h>
 
 VALUE rb_mMath;