diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Builder.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Builder.java
index 77657686058..a8c589011c3 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Builder.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Builder.java
@@ -2363,6 +2363,10 @@ public class Builder extends BuildObject implements IBuilder, IMatchKeyProvider
 	public boolean isSystemObject() {
 		if(isTest)
 			return true;
+		
+		if(getConvertToId().length() != 0)
+			return true;
+		
 		if(getParent() != null)
 			return getParent().isSystemObject();
 		return false;
diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Tool.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Tool.java
index cea233b431c..f57373ca2f6 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Tool.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/Tool.java
@@ -3863,6 +3863,10 @@ public class Tool extends HoldsOptions implements ITool, IOptionCategory, IMatch
 	public boolean isSystemObject() {
 		if(isTest)
 			return true;
+		
+		if(getConvertToId().length() != 0)
+			return true;
+		
 		IBuildObject bo = getParent();
 		if(bo instanceof IToolChain)
 			return ((IToolChain)bo).isSystemObject();
diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/ToolChain.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/ToolChain.java
index 934a9e57339..ab9d35c84ab 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/ToolChain.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/ToolChain.java
@@ -2333,6 +2333,9 @@ public class ToolChain extends HoldsOptions implements IToolChain, IBuildPropert
 		if(isTest)
 			return true;
 		
+		if(getConvertToId().length() != 0)
+			return true;
+		
 		if(getParent() != null)
 			return getParent().isSystemObject();