1 files changed, 1 insertions, 1 deletions
diff --git a/prec.c b/prec.c
index 80396dfdef..981dcbc85c 100644
--- a/prec.c
+++ b/prec.c
@@ -10,7 +10,7 @@
 
 **********************************************************************/
 
-#include "ruby.h"
+#include "ruby/ruby.h"
 
 VALUE rb_mPrecision;