diff --git a/src/common/interfaces/libpq/fe-auth.cpp b/src/common/interfaces/libpq/fe-auth.cpp
index fc56b5099..1e7773e2d 100644
--- a/src/common/interfaces/libpq/fe-auth.cpp
+++ b/src/common/interfaces/libpq/fe-auth.cpp
@@ -1040,9 +1040,11 @@ static int pg_password_sendauth(PGconn* conn, const char* password, AuthRequest
 
             break;
         }
+#ifdef USE_LDAP
         case AUTH_REQ_PASSWORD:
             pwd_to_send = password;
             break;
+#endif
         /*
          * Notice: Authentication of send password directly are not currently supported.
          * need to: We remove the branch of AUTH_REQ_PASSWORD here for both implication and
@@ -1211,7 +1213,9 @@ int pg_fe_sendauth(AuthRequest areq, PGconn* conn)
 
         case AUTH_REQ_MD5:
         case AUTH_REQ_MD5_SHA256:
+#ifdef USE_LDAP
         case AUTH_REQ_PASSWORD:
+#endif
         case AUTH_REQ_SHA256:
 #ifdef ENABLE_LITE_MODE
         case AUTH_REQ_SHA256_RFC: