diff --git a/du2/program.c b/du2/program.c
index a735c23..5636a8d 100644
--- a/du2/program.c
+++ b/du2/program.c
@@ -26,7 +26,7 @@ int main() {
 	int max_position = 1;
 
 	for (int i = 0; fgets(glass[i], 20, stdin) != NULL; i++){
-		for (int j = 0; j < strlen(glass[i]; j++)){
+		for (int j = 0; j < strlen(glass[i]); j++){
 			if (!isdigit(glass[i][j]) || atoi (glass[i]) < 1){
 				goto LABEL;
 			}