diff --git a/org.adempiere.base/src/org/compiere/model/MAssetGroup.java b/org.adempiere.base/src/org/compiere/model/MAssetGroup.java
index de3d9bd917..a7429ca6c3 100644
--- a/org.adempiere.base/src/org/compiere/model/MAssetGroup.java
+++ b/org.adempiere.base/src/org/compiere/model/MAssetGroup.java
@@ -58,6 +58,8 @@ public class MAssetGroup extends X_A_Asset_Group
 		ag = new MAssetGroup(ctx, A_Asset_Group_ID, null);
 		if (ag != null && ag.get_ID() != A_Asset_Group_ID)
 			ag = null;
+		else
+			s_cache.put(A_Asset_Group_ID, ag);
 		//
 		return ag;
 	}
diff --git a/org.adempiere.base/src/org/compiere/model/MProductCategory.java b/org.adempiere.base/src/org/compiere/model/MProductCategory.java
index 1c836a32d9..4c1603765e 100644
--- a/org.adempiere.base/src/org/compiere/model/MProductCategory.java
+++ b/org.adempiere.base/src/org/compiere/model/MProductCategory.java
@@ -52,10 +52,13 @@ public class MProductCategory extends X_M_Product_Category
 	public static MProductCategory get (Properties ctx, int M_Product_Category_ID)
 	{
 		Integer ii = new Integer (M_Product_Category_ID);
-		MProductCategory pc = (MProductCategory)s_cache.get(ii);
-		if (pc == null)
-			pc = new MProductCategory (ctx, M_Product_Category_ID, null);
-		return pc;
+		MProductCategory retValue = (MProductCategory)s_cache.get(ii);
+		if (retValue != null)
+			return retValue;
+		retValue = new MProductCategory (ctx, M_Product_Category_ID, null);
+		if (retValue.get_ID () != 0)
+			s_cache.put (M_Product_Category_ID, retValue);
+		return retValue;
 	}	//	get
 	
 	/**