diff --git a/libavformat/pjsdec.c b/libavformat/pjsdec.c
index a69a31660d..6f5db37886 100644
--- a/libavformat/pjsdec.c
+++ b/libavformat/pjsdec.c
@@ -53,7 +53,8 @@ static int64_t read_ts(char **line, int *duration)
     int64_t start, end;
 
     if (sscanf(*line, "%"SCNd64",%"SCNd64, &start, &end) == 2) {
-        *line += strcspn(*line, "\"") + 1;
+        *line += strcspn(*line, "\"");
+        *line += !!**line;
         *duration = end - start;
         return start;
     }