1 files changed, 1 insertions, 1 deletions
diff --git a/regexec.c b/regexec.c
index a0625fdf7e..5d759032e8 100644
--- a/regexec.c
+++ b/regexec.c
@@ -254,7 +254,7 @@ onig_region_copy(OnigRegion* to, OnigRegion* from)
 
 /** stack **/
 #define INVALID_STACK_INDEX   -1
-typedef int  StackIndex;
+typedef long  StackIndex;
 
 typedef struct _StackType {
   unsigned int type;