diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
index 5274993ec6..42aacbd1b9 100644
--- a/libavformat/rtmpproto.c
+++ b/libavformat/rtmpproto.c
@@ -1111,7 +1111,7 @@ static int rtmp_calc_swfhash(URLContext *s)
     RTMPContext *rt = s->priv_data;
     uint8_t *in_data = NULL, *out_data = NULL, *swfdata;
     int64_t in_size;
-    URLContext *stream;
+    URLContext *stream = NULL;
     char swfhash[32];
     int swfsize;
     int ret = 0;