diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/CElementAdapterFactory.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/CElementAdapterFactory.java
index 94d25f855e3..283899471c1 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/CElementAdapterFactory.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/CElementAdapterFactory.java
@@ -74,7 +74,7 @@ public class CElementAdapterFactory implements IAdapterFactory {
 				if (res != null)
 					return res.getWorkspace().getRoot();
 			} else if (IProject.class.equals(key)) {
-				res = celem.getUnderlyingResource();
+				res = celem.getResource();
 				if (res != null)
 					return res.getProject();
 			} else if (IResource.class.equals(key)) {