1 files changed, 1 insertions, 1 deletions
diff --git a/proc.c b/proc.c
index b383d85d8e..c732917fd8 100644
--- a/proc.c
+++ b/proc.c
@@ -733,7 +733,7 @@ proc_to_s(VALUE self)
 			 line_no, is_lambda);
     }
     else {
-	str = rb_sprintf("#<%s:%p%s>", cname, proc->block.iseq,
+	str = rb_sprintf("#<%s:%p%s>", cname, (void *)proc->block.iseq,
 			 is_lambda);
     }