diff --git a/du6/a_station.c b/du6/a_station.c
index 5e32121..04a699d 100644
--- a/du6/a_station.c
+++ b/du6/a_station.c
@@ -25,7 +25,7 @@ void destroy_station(struct station* stanica){
 int select_track(struct station* stanica, const char* ciel){
     unsigned long heslo = 5381;
     int znak;
-    while ((znak == *ciel++)){
+    while ((znak = *ciel++)){
         heslo = ((heslo << 5) + heslo) + znak;
     }
     return heslo % stanica->track_count;