diff --git a/src/common/backend/utils/misc/guc.cpp b/src/common/backend/utils/misc/guc.cpp
index 6686aad04..248478aea 100644
--- a/src/common/backend/utils/misc/guc.cpp
+++ b/src/common/backend/utils/misc/guc.cpp
@@ -12881,9 +12881,9 @@ const char* GetConfigOption(const char* name, bool missing_ok, bool restrict_sup
             ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("unrecognized configuration parameter \"%s\"", name)));
     }
 
-    if (restrict_superuser && (record->flags & GUC_SUPERUSER_ONLY) && (GetUserId() != BOOTSTRAP_SUPERUSERID))
+    if (restrict_superuser && (record->flags & GUC_SUPERUSER_ONLY) && !superuser())
         ereport(ERROR,
-            (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("must be initial account to examine \"%s\"", name)));
+            (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("must be superuser to examine \"%s\"", name)));
 
     switch (record->vartype) {
         case PGC_BOOL:
@@ -12935,9 +12935,9 @@ const char* GetConfigOptionResetString(const char* name)
     if (record == NULL)
         ereport(
             ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("unrecognized configuration parameter \"%s\"", name)));
-    if ((record->flags & GUC_SUPERUSER_ONLY) && (GetUserId() != BOOTSTRAP_SUPERUSERID))
+    if ((record->flags & GUC_SUPERUSER_ONLY) && !superuser())
         ereport(ERROR,
-            (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("must be initial account to examine \"%s\"", name)));
+            (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("must be superuser to examine \"%s\"", name)));
 
     switch (record->vartype) {
         case PGC_BOOL:
@@ -14115,7 +14115,7 @@ static void ShowGUCConfigOption(const char* name, DestReceiver* dest)
  */
 static void ShowAllGUCConfig(DestReceiver* dest)
 {
-    bool am_superuser = (GetUserId() == BOOTSTRAP_SUPERUSERID);
+    bool am_superuser = superuser();
     int i;
     TupOutputState* tstate = NULL;
     TupleDesc tupdesc;
diff --git a/src/test/regress/output/unify_superuser_definition.source b/src/test/regress/output/unify_superuser_definition.source
index d22f954c5..4ba379321 100644
--- a/src/test/regress/output/unify_superuser_definition.source
+++ b/src/test/regress/output/unify_superuser_definition.source
@@ -19,11 +19,11 @@ ALTER SYSTEM SET
 \! @gsqldir@/gsql -d postgres -p 25632 -U grant_all -W openGauss@123 -c "alter system set password_reuse_max=0;"
 ALTER SYSTEM SET
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "show password_reuse_max;";
-ERROR:  must be initial account to examine "password_reuse_max"
+ERROR:  must be superuser to examine "password_reuse_max"
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "alter system set password_reuse_max=1;";
 ERROR:  must be superuser to execute ALTER SYSTEM SET command
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "show password_reuse_max;";
-ERROR:  must be initial account to examine "password_reuse_max"
+ERROR:  must be superuser to examine "password_reuse_max"
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "alter system set password_reuse_max=0;"
 ERROR:  must be superuser to execute ALTER SYSTEM SET command
 show password_reuse_max;
@@ -58,11 +58,11 @@ SET
 \! @gsqldir@/gsql -d postgres -p 25632 -U grant_all -W openGauss@123 -c "set pljava_vmoptions='';"
 SET
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "show pljava_vmoptions;";
-ERROR:  must be initial account to examine "pljava_vmoptions"
+ERROR:  must be superuser to examine "pljava_vmoptions"
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "set pljava_vmoptions='aaa';";
 ERROR:  permission denied to set parameter "pljava_vmoptions"
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "show pljava_vmoptions;";
-ERROR:  must be initial account to examine "pljava_vmoptions"
+ERROR:  must be superuser to examine "pljava_vmoptions"
 \! @gsqldir@/gsql -d postgres -p 25632 -U standard_user -W openGauss@123 -c "set pljava_vmoptions='';"
 ERROR:  permission denied to set parameter "pljava_vmoptions"
 show pljava_vmoptions;