diff --git a/org.adempiere.base/src/org/compiere/model/GridTable.java b/org.adempiere.base/src/org/compiere/model/GridTable.java
index 1fbe6f89e2..af1d6b0dc9 100644
--- a/org.adempiere.base/src/org/compiere/model/GridTable.java
+++ b/org.adempiere.base/src/org/compiere/model/GridTable.java
@@ -3012,13 +3012,13 @@ public class GridTable extends AbstractTableModel
 		close(false);
 		if (retainedWhere != null)
 		{
-			// String whereClause = m_whereClause;
 			if (m_whereClause != null && m_whereClause.trim().length() > 0)
 			{
-				m_whereClause = "((" + m_whereClause + ") OR (" + retainedWhere + ")) ";
+				StringBuilder orRetainedWhere = new StringBuilder(") OR (").append(retainedWhere).append(")) ");
+				if (! m_whereClause.contains(orRetainedWhere.toString()))
+					m_whereClause = "((" + m_whereClause + orRetainedWhere.toString();
 			}
 			open(m_maxRows);
-			// m_whereClause = whereClause;
 		}
 		else
 		{