diff --git a/src/corrupter.c b/src/corrupter.c
index b2ad54e..f387b14 100644
--- a/src/corrupter.c
+++ b/src/corrupter.c
@@ -103,7 +103,8 @@ Corrupter_Result* corrupt_file(Corrupter_Param* param) {
 		for (file_offset_t i = start; i < end; i += 3) {
 			FSEEK_MACRO(file, i, SEEK_SET);
 			byte byte_values[3];
-			if (fread(&byte_values, sizeof(byte), 3, file) != 3) {
+			size_t ret_value = fread(&byte_values, sizeof(byte), 3, file);
+			if (ret_value == 0 || ret_value > 3) {
 				result->error = true;
 				fclose(file);
 				return result;
@@ -144,13 +145,13 @@ Corrupter_Result* corrupt_file(Corrupter_Param* param) {
 
 				// write the modified byte back to the file
 				FSEEK_MACRO(file, i, SEEK_SET);
-				if (fwrite(&byte_values, sizeof(byte), 3, file) == 3)
-					continue;
-
-				// on error
-				result->error = true;
-				fclose(file);
-				return result;
+				size_t ret_value = fwrite(&byte_values, sizeof(byte), 3, file);
+				if (ret_value == 0 || ret_value > 3) {
+					// on error
+					result->error = true;
+					fclose(file);
+					return result;
+				}
 			}
 
 			if (damaged_byte)