diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/BooleanExpressionApplicabilityCalculator.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/BooleanExpressionApplicabilityCalculator.java
index ad4814530d6..6208b03e2c2 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/BooleanExpressionApplicabilityCalculator.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/BooleanExpressionApplicabilityCalculator.java
@@ -222,7 +222,7 @@ public class BooleanExpressionApplicabilityCalculator implements IOptionApplicab
 	
 	public String[] getReferencedPropertyIds(){
 		Map map = getReferencedProperties();
-		return (String[])map.entrySet().toArray(new String[map.size()]);
+		return (String[])map.keySet().toArray(new String[map.size()]);
 	}
 
 	public String[] getReferencedValueIds(String propertyId){