diff --git a/du6/program.c b/du6/program.c
index 0969a60..c9af8a3 100644
--- a/du6/program.c
+++ b/du6/program.c
@@ -69,7 +69,7 @@ void run_knowledge_system(struct tree* node) {
     if (node->left != NULL || node->right != NULL) {
         char answer[10];
         if (fgets(answer, sizeof(answer), stdin) == NULL) {
-            printf("Koniec_vstupu\n");
+            printf("Koniec vstupu\n");
             return;
         }
         if (answer[0] == 'a') {