--- a/cdt/cdt_5_0_x/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/MacroEntry.java	Tue Jun 09 10:02:47 2009 -0500
+++ b/cdt/cdt_5_0_x/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/MacroEntry.java	Tue Jun 09 15:42:55 2009 -0500
@@ -45,6 +45,17 @@
 	}
 
 	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = super.hashCode();
+		result = prime * result
+				+ ((macroName == null) ? 0 : macroName.hashCode());
+		result = prime * result
+				+ ((macroValue == null) ? 0 : macroValue.hashCode());
+		return result;
+	}
+
+	@Override
 	public boolean equals(Object obj) {
 		if (obj instanceof IMacroEntry) {
 			IMacroEntry otherEntry = (IMacroEntry)obj;