1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index aa5a3f332..0a60057e5 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -112,7 +112,7 @@ struct ExprString : Expr
 {
     Symbol s;
     Value v;
-    ExprString(const Symbol & s) : s(s) { mkString(v, s); };
+    ExprString(const Symbol & s) : s(s) { v.mkString(s); };
     COMMON_METHODS
     Value * maybeThunk(EvalState & state, Env & env);
 };