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-rw-r--r--src/libexpr/nixexpr.hh4
1 files changed, 1 insertions, 3 deletions
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index 86a7bfd506a0..bc6c3287c79d 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -277,10 +277,8 @@ MakeBinOp(OpConcatLists, "++")
 
 struct ExprConcatStrings : Expr
 {
-    bool forceString;
     vector<Expr *> * es;
-    ExprConcatStrings(bool forceString, vector<Expr *> * es)
-        : forceString(forceString), es(es) { };
+    ExprConcatStrings(vector<Expr *> * es) : es(es) { };
     COMMON_METHODS
 };