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-rw-r--r--src/nix-store/xmlgraph.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix-store/xmlgraph.hh b/src/nix-store/xmlgraph.hh
index 6454d3a28d16..a6e7d4e2805a 100644
--- a/src/nix-store/xmlgraph.hh
+++ b/src/nix-store/xmlgraph.hh
@@ -6,6 +6,6 @@ namespace nix {
 
 class Store;
 
-void printXmlGraph(Store & store, const PathSet & roots);
+void printXmlGraph(ref<Store> store, const PathSet & roots);
 
 }