1 files changed, 1 insertions, 0 deletions
diff --git a/re.c b/re.c
index efcc9dbdda..eb87d0ea88 100644
--- a/re.c
+++ b/re.c
@@ -13,6 +13,7 @@
 #include "ruby/re.h"
 #include "ruby/util.h"
 #include "regint.h"
+#include "encindex.h"
 #include <ctype.h>
 
 VALUE rb_eRegexpError;