diff --git a/org.adempiere.base/src/org/compiere/model/MAcctSchema.java b/org.adempiere.base/src/org/compiere/model/MAcctSchema.java
index 5f2b3b2ce7..e30e0380e6 100644
--- a/org.adempiere.base/src/org/compiere/model/MAcctSchema.java
+++ b/org.adempiere.base/src/org/compiere/model/MAcctSchema.java
@@ -90,7 +90,7 @@ public class MAcctSchema extends X_C_AcctSchema
 	 *  @param trxName optional trx 
 	 *  @return Array of AcctSchema of Client
 	 */
-	public static MAcctSchema[] getClientAcctSchema (Properties ctx, int AD_Client_ID, String trxName)
+	public static synchronized MAcctSchema[] getClientAcctSchema (Properties ctx, int AD_Client_ID, String trxName)
 	{
 		//  Check Cache
 		Integer key = new Integer(AD_Client_ID);