missed a spot

src/mod/formats/mod_sndfile/mod_sndfile.c

@@ -83,7 +83,7 @@ static switch_status_t sndfile_file_open(switch_file_handle_t *handle, const cha
 	}
 
 	if (switch_test_flag(handle, SWITCH_FILE_FLAG_WRITE)) {
-		if (switch_test_flag(handle, SWITCH_FILE_WRITE_APPEND) || switch_test_flag(handle, SWITCH_FILE_WRITE_OVER)) {
+		if (switch_test_flag(handle, SWITCH_FILE_WRITE_APPEND) || switch_test_flag(handle, SWITCH_FILE_WRITE_OVER) || handle->offset_pos) {
 			mode += SFM_RDWR;
 		} else {
 			mode += SFM_WRITE;