diff --git a/cv8/program.c b/cv8/program.c
index b5db246..72f1e74 100644
--- a/cv8/program.c
+++ b/cv8/program.c
@@ -57,7 +57,11 @@ void ask(struct node* tree){
         return;
     }
     char buff[SIZE];
-    char* r = fgets(buff, SIZE, stdin);;
+    char* r = fgets(buff, SIZE, stdin);
+    if(r == NULL){
+        puts("Koniec vstupu");
+        return;
+    }
     while(r[0] == '\n'){
     r = fgets(buff, SIZE, stdin);
     }