diff --git a/src/Access/ExternalAuthenticators.cpp b/src/Access/ExternalAuthenticators.cpp
index 9a65c494cc0..e1c598f26f5 100644
--- a/src/Access/ExternalAuthenticators.cpp
+++ b/src/Access/ExternalAuthenticators.cpp
@@ -189,7 +189,7 @@ void parseLDAPServer(LDAPClient::Params & params, const Poco::Util::AbstractConf
         params.port = (params.enable_tls == LDAPClient::Params::TLSEnable::YES ? 636 : 389);
 
     if (has_search_limit)
-        params.search_limit = config.getUInt64(ldap_server_config + ".search_limit");
+        params.search_limit = static_cast<UInt32>(config.getUInt64(ldap_server_config + ".search_limit"));
 }
 
 void parseKerberosParams(GSSAcceptorContext::Params & params, const Poco::Util::AbstractConfiguration & config)
diff --git a/src/Access/LDAPClient.cpp b/src/Access/LDAPClient.cpp
index 25f7607b65c..856ffd18a32 100644
--- a/src/Access/LDAPClient.cpp
+++ b/src/Access/LDAPClient.cpp
@@ -275,7 +275,7 @@ bool LDAPClient::openConnection()
     }
 
     {
-        const int size_limit = params.search_limit;
+        const int size_limit = static_cast<int>(params.search_limit);
         handleError(ldap_set_option(handle, LDAP_OPT_SIZELIMIT, &size_limit));
     }