--- a/cdt/cdt_5_0_x/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/IncludeEntry.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/IncludeEntry.java	Tue Jun 09 15:42:55 2009 -0500
@@ -49,6 +49,16 @@
 		return isSystemInclude;
 	}
 
+@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = super.hashCode();
+		result = prime * result
+				+ ((includePath == null) ? 0 : includePath.hashCode());
+		result = prime * result + (isSystemInclude ? 1231 : 1237);
+		return result;
+	}
+
 	@Override
 	public boolean equals(Object obj) {
 		if (obj instanceof IIncludeEntry) {