diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h
index d16c98ca8a..55326e9e05 100644
--- a/libavformat/rtsp.h
+++ b/libavformat/rtsp.h
@@ -390,7 +390,7 @@ typedef struct RTSPState {
 #define RTSP_FLAG_FILTER_SRC  0x1    /**< Filter incoming UDP packets -
                                           receive packets only from the right
                                           source address and port. */
-#define RTSP_FLAG_LISTEN 0x2         /**< Wait for incoming connections. */
+#define RTSP_FLAG_LISTEN      0x2    /**< Wait for incoming connections. */
 
 /**
  * Describe a single stream, as identified by a single m= line block in the