diff --git a/src/syscap_tool.c b/src/syscap_tool.c
index 705693d..b2ab4fd 100644
--- a/src/syscap_tool.c
+++ b/src/syscap_tool.c
@@ -658,7 +658,7 @@ int32_t ComparePriSyscap(char *pcid, char *rpcid, uint32_t pcidLen, uint32_t rpc
     return prisyscapFlag;
 }
 
-int32_t CompareVersion(uint32_t *pcidOsArray, uint32_t *rpcidOsAarry)
+static int32_t CompareVersion(uint32_t *pcidOsArray, uint32_t *rpcidOsAarry)
 {
     int32_t versionFlag = 0;
     uint16_t pcidVersion = NtohsInter(((PCIDMain *)pcidOsArray)->apiVersion);