diff --git a/interfaces/inner_api/syscap_interface.c b/interfaces/inner_api/syscap_interface.c
index db288e71c568372d5ffe454529b9993510d1faa3..a42a7a5965ff8f02a8602da85572157527f4c634 100644
--- a/interfaces/inner_api/syscap_interface.c
+++ b/interfaces/inner_api/syscap_interface.c
@@ -639,7 +639,7 @@ int32_t ComparePcidString(const char *pcidString, const char *rpcidString, Compa
         retFlag |= 0x1 << 1;
         result->missSyscapNum = ossyscapFlag + prisyscapFlag;
     }
-    return retFlag;
+    return (int32_t)retFlag;
 }
 
 int32_t FreeCompareError(CompareError *result)