1 files changed, 2 insertions, 0 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 8caadaeddc..1b89553772 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -3111,6 +3111,8 @@ gzreader_gets(argc, argv, obj)
     if (NIL_P(rs)) {
 	dst = gzfile_read_all(gz);
 	if (RSTRING(dst)->len != 0) gz->lineno++;
+	else
+		return Qnil;
 	return dst;
     }