diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/sourcelookup/CSourceNotFoundEditor.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/sourcelookup/CSourceNotFoundEditor.java
index 3a3441510f8..3f098fa3505 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/sourcelookup/CSourceNotFoundEditor.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/sourcelookup/CSourceNotFoundEditor.java
@@ -272,7 +272,7 @@ public class CSourceNotFoundEditor extends CommonSourceNotFoundEditor {
 	
 	protected void locateFile() {
 		FileDialog dialog = new FileDialog(getEditorSite().getShell(), SWT.NONE);
-		Path missingPath = new Path(missingFile);
+		IPath missingPath = MapEntrySourceContainer.createPath(missingFile);
 		dialog.setFilterNames(new String[] {SourceLookupUIMessages.CSourceNotFoundEditor_2});
 		dialog.setFilterExtensions(new String[] {"*." + missingPath.getFileExtension()}); //$NON-NLS-1$
 		String res = dialog.open();