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-rw-r--r--src/libstore/references.hh4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libstore/references.hh b/src/libstore/references.hh
index 76a7ee166dbe..7d068eb51700 100644
--- a/src/libstore/references.hh
+++ b/src/libstore/references.hh
@@ -2,10 +2,12 @@
 #define __REFERENCES_H
 
 #include "types.hh"
+#include "hash.hh"
 
 namespace nix {
 
-PathSet scanForReferences(const Path & path, const PathSet & refs);
+PathSet scanForReferences(const Path & path, const PathSet & refs,
+    Hash & hash);
     
 }