diff --git a/du4/program.c b/du4/program.c
index 09a3a6e..394f41b 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -22,7 +22,6 @@ int main() {
                 has_operator = 1;
                 op = *start;
             } else if ((*start < '0' || *start > '9') && *start != ' ' && *start != '=' && *start != '.') {
-                printf("CHYBA\n");
                 goto next_line;
             }
             start++;