diff --git a/du3/program.c b/du3/program.c
index 3dd97ac..fa02602 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -42,7 +42,7 @@ int main() {
 						goto LABEL;
 					}
 					if(date[0] >= 29 && date[1] == 2 && (date[2] % 4 != 0 || (date[2] % 100 == 0 && date[2] % 400 != 0))){
-        				puts("Neplatny datum");
+        				puts("Neplatny datum.");
         				goto LABEL;
     				}
 					date[0] += 7;