diff --git a/pgadmin/frm/frmMaintenance.cpp b/pgadmin/frm/frmMaintenance.cpp
index 9a6585d..e2b65a5 100644
--- a/pgadmin/frm/frmMaintenance.cpp
+++ b/pgadmin/frm/frmMaintenance.cpp
@@ -120,6 +120,13 @@ wxString frmMaintenance::GetSql()
 	{
 		case 0:
 		{
+			/* Warn about VACUUM FULL on < 9.0 */
+			if (chkFull->GetValue() &&
+				!conn->BackendMinimumVersion(9, 0))
+			{
+				if (wxMessageBox(_("VACUUM FULL is not recommended due to table bloating issues - consider using CLUSTER instead.\nAre you sure you want to proceed with VACUUM FULL?"), _("Confirm VACUUM FULL?"), wxICON_QUESTION | wxYES_NO) == wxNO)
+					return wxEmptyString;
+			}
 			sql = wxT("VACUUM ");
 
 			if (chkFull->GetValue())