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-rw-r--r--src/libexpr/eval.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 5ae5a1e3cf24..6da89c58a6ae 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -120,7 +120,7 @@ public:
     EvalState();
     ~EvalState();
 
-    void addToSearchPath(const string & s);
+    void addToSearchPath(const string & s, bool warn = false);
 
     /* Parse a Nix expression from the specified file. */
     Expr * parseExprFromFile(const Path & path);