diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 85666f5f3e..08ee201c79 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -464,7 +464,7 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
     struct v4l2_streamparm streamparm = {0};
     struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
     int i, ret;
-    AVRational framerate_q;
+    AVRational framerate_q={0};
 
     streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;