1 files changed, 1 insertions, 1 deletions
diff --git a/util.c b/util.c
index e37d0adcbc..98d161935f 100644
--- a/util.c
+++ b/util.c
@@ -169,7 +169,7 @@ ruby_add_suffix(str, suffix)
     char buf[1024];
 
     if (RSTRING(str)->len > 1000)
-        rb_fatal("Cannot do inplace edit on long filename (%d characters)",
+        rb_fatal("Cannot do inplace edit on long filename (%ld characters)",
 		 RSTRING(str)->len);
 
 #if defined(DJGPP) || defined(__CYGWIN32__) || defined(NT)