diff --git a/third_party/go_crc64.c b/third_party/go_crc64.c
index ef180d89928ccb0baa828e761a9678a9dd68ef26..44d0a756acba819d694eabcb111f762a962925f4 100644
--- a/third_party/go_crc64.c
+++ b/third_party/go_crc64.c
@@ -124,14 +124,14 @@ bool isula_crc_update(const isula_crc_table_t *tab, uint64_t *crc, unsigned char
     return true;
 }
 
-void isula_crc_sum(uint64_t crc, uint8_t data[8])
+void isula_crc_sum(uint64_t crc, unsigned char data[8])
 {
-    data[0] = (uint8_t)(crc >> 56);
-    data[1] = (uint8_t)(crc >> 48);
-    data[2] = (uint8_t)(crc >> 40);
-    data[3] = (uint8_t)(crc >> 32);
-    data[4] = (uint8_t)(crc >> 24);
-    data[5] = (uint8_t)(crc >> 16);
-    data[6] = (uint8_t)(crc >> 8);
-    data[7] = (uint8_t)(crc);
+    data[0] = (unsigned char)(crc >> 56);
+    data[1] = (unsigned char)(crc >> 48);
+    data[2] = (unsigned char)(crc >> 40);
+    data[3] = (unsigned char)(crc >> 32);
+    data[4] = (unsigned char)(crc >> 24);
+    data[5] = (unsigned char)(crc >> 16);
+    data[6] = (unsigned char)(crc >> 8);
+    data[7] = (unsigned char)(crc);
 }
diff --git a/third_party/go_crc64.h b/third_party/go_crc64.h
index 23433d54dd0cca7131cae9bc11936e5e7f17da36..a1438d82d0e4b23f22c3d9099bef2d55d3a562d5 100644
--- a/third_party/go_crc64.h
+++ b/third_party/go_crc64.h
@@ -45,7 +45,7 @@ const isula_crc_table_t* new_isula_crc_table(uint64_t poly);
 
 bool isula_crc_update(const isula_crc_table_t *tab, uint64_t *crc, unsigned char *data, size_t data_len);
 
-void isula_crc_sum(uint64_t crc, uint8_t data[8]);
+void isula_crc_sum(uint64_t crc, unsigned char data[8]);
 
 #ifdef __cplusplus
 }