diff --git a/asfheader.c b/asfheader.c
index a1417d4ad2..2d5cabf74f 100644
--- a/asfheader.c
+++ b/asfheader.c
@@ -216,7 +216,7 @@ if(verbose){
 
     case 0x75b22633: // Content description
       if(verbose){
-        char *string;
+        char *string=NULL;
         stream_read(demuxer->stream,(char*) &contenth,sizeof(contenth));
         // extract the title
         if( contenth.title_size!=0 ) {