1 files changed, 1 insertions, 1 deletions
diff --git a/string.c b/string.c
index 08c958d8e4..d27b5b4ff6 100644
--- a/string.c
+++ b/string.c
@@ -1647,7 +1647,7 @@ rb_str_splice(str, beg, len, val)
 	}
 	beg += RSTRING(str)->len;
     }
-    if (RSTRING(str)->len < beg + len) {
+    if (RSTRING(str)->len < len || RSTRING(str)->len < beg + len) {
 	len = RSTRING(str)->len - beg;
     }