diff --git a/du5/a_station.c b/du5/a_station.c
index e9d9a38..a7af519 100644
--- a/du5/a_station.c
+++ b/du5/a_station.c
@@ -56,7 +56,7 @@ void add_target_capacity(struct station* station,const char* target, int capacit
         return;
     }
    }
-   else if (count == res && strcmp(ptr->value, target) != 0){
+   else if (count == res && ptr && strcmp(ptr->value, target) != 0){
     struct car* next = (struct car*)calloc(1, sizeof(struct car));
     strcpy(next->value, target);
     next->capacity = capacity;
@@ -69,6 +69,9 @@ void add_target_capacity(struct station* station,const char* target, int capacit
     }
 
 
+   }
+   if (!ptr){
+    return;
    }
    ptr->capacity += capacity;
    return;