diff --git a/du5/a_station.c b/du5/a_station.c
index 080769a..ce4e013 100644
--- a/du5/a_station.c
+++ b/du5/a_station.c
@@ -16,7 +16,7 @@ void destroy_station(struct station* station){
 }
 
 int select_track(struct station* station, const char* target){
-    int hash = 0;
+    unsigned int hash = 0;
     for (int  i = 0; i < strlen(target); i++)
     { hash += target[i] + (hash<<6) + (hash<<16) - hash;