diff --git a/interfaces/inner_api/syscap_interface.c b/interfaces/inner_api/syscap_interface.c
index 1a70a9677bcaabf1a82bf5ded3539cd461cf2ea9..f2f8738f4af0916b68a692241f3ef172c073c8dd 100644
--- a/interfaces/inner_api/syscap_interface.c
+++ b/interfaces/inner_api/syscap_interface.c
@@ -525,6 +525,9 @@ static int32_t CopySyscopToRet(struct PcidPriSyscapInfo *pcidPriSyscapInfo, cons
             break;
         }
     }
+    if(t == allSyscapNum){
+        return -1;
+    }
     pcidPriSyscapInfo->ret = strcpy_s(tempSyscap, sizeof(char) * SINGLE_SYSCAP_LEN, g_arraySyscap[t].str);
     // 2, header of pcid & rpcid
     if (pcidPriSyscapInfo->ret != EOK) {