1 files changed, 1 insertions, 1 deletions
diff --git a/regint.h b/regint.h
index 633cd885c6..ca9f2b12c8 100644
--- a/regint.h
+++ b/regint.h
@@ -720,7 +720,7 @@ typedef struct {
   BBuf*  mbuf;   /* multi-byte info or NULL */
 } CClassNode;
 
-typedef long OnigStackIndex;
+typedef intptr_t OnigStackIndex;
 
 typedef struct _OnigStackType {
   unsigned int type;