diff --git a/crc.c b/crc.c
index d0c7601..8ee9803 100644
--- a/crc.c
+++ b/crc.c
@@ -211,7 +211,6 @@ void random_data_change(unsigned char *color_data, int width, int length) {
 
 			unsigned char *check_data_array = file_to_char_array(check_data, &check_data_length);
 
-			fflush(check_data);
 			fclose(check_data);
 			free(check_data_buff);
 
@@ -298,7 +297,6 @@ int change_idat_content(unsigned char *addr, char *message, int accuracy, unsign
 
 			random_data_change(uncom_data_array, 16, uncom_data_size);
 
-			fflush(uncom_data);
 			fclose(uncom_data);
 			free(uncom_data_buff);
 
@@ -319,7 +317,8 @@ int main() {
 	FILE *fp;
 	size_t i = 0;
 	unsigned long offset = 0;
-	char message[1] = "";
+	unsigned char *message = malloc(sizeof(char));
+	message[0] = '\0';
 
 	if(sodium_init() == -1) {
 		return EXIT_FAILURE;