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-rw-r--r--src/libexpr/nixexpr.hh1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index 1d03220f644a..5c0071dca2ce 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -137,6 +137,7 @@ struct ExprAttrs : Expr
     Attrs attrs;
     list<Inherited> inherited;
     std::map<Symbol, Pos> attrNames; // used during parsing
+    std::map<Symbol, unsigned int> displs;
     ExprAttrs() : recursive(false) { };
     COMMON_METHODS
 };