ensure a hierarchical URL is created
diff --git a/bundles/org.eclipse.equinox.p2.ui/src/org/eclipse/equinox/internal/provisional/p2/ui/dialogs/URLValidator.java b/bundles/org.eclipse.equinox.p2.ui/src/org/eclipse/equinox/internal/provisional/p2/ui/dialogs/URLValidator.java
index 329a8e1..f0c9856 100644
--- a/bundles/org.eclipse.equinox.p2.ui/src/org/eclipse/equinox/internal/provisional/p2/ui/dialogs/URLValidator.java
+++ b/bundles/org.eclipse.equinox.p2.ui/src/org/eclipse/equinox/internal/provisional/p2/ui/dialogs/URLValidator.java
@@ -54,7 +54,7 @@
 	}
 
 	public static String makeFileURLString(String path) {
-		return FILE_PROTOCOL_PREFIX + path;
+		return FILE_PROTOCOL_PREFIX + '/' + path;
 	}
 
 	protected abstract IStatus validateRepositoryURL(URL url, boolean contactRepositories, IProgressMonitor monitor);