diff --git a/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_query.c b/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_query.c
index ee3d411f81fda6b469e13cb33e53d301b2b9eec5..dd3f0eed76fbbcabc0a26e316369146958199134 100644
--- a/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_query.c
+++ b/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_query.c
@@ -157,7 +157,7 @@ int32_t CmGetCertPathList(const struct CmContext *context, uint32_t store, struc
     return CM_SUCCESS;
 }
 
-static int32_t GetSysCertPathCount(void)
+static uint32_t GetSysCertPathCount(void)
 {
     if (CmIsDirExist(SYSTEM_CA_STORE_GM) == CM_SUCCESS) {
         CM_LOG_D("exist gm system ca store path.");
diff --git a/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_service.c b/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_service.c
index 835b06f0278bfc210b11a09d5fd1018871d33064..22e3f00d41be1265ee4ef6f6b5083133d804e79b 100644
--- a/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_service.c
+++ b/services/cert_manager_standard/cert_manager_engine/main/core/src/cert_manager_service.c
@@ -1038,7 +1038,7 @@ int32_t CmInstallMultiUserCert(const struct CmContext *context, const struct CmB
         CM_LOG_E("init certStack failed");
         return CMR_ERROR_INVALID_CERT_FORMAT;
     }
-    uriListSize = (int32_t)sk_X509_num(certStack);
+    uriListSize = (uint32_t)sk_X509_num(certStack);
     // check buffer size
     uint32_t capacity = (certUri->size - sizeof(uint32_t)) / MAX_LEN_URI;
     if (uriListSize > capacity) {