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-rw-r--r--src/libexpr/eval.hh1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index b34e91055a37..a7f4e69437be 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -62,6 +62,7 @@ Expr strictEvalExpr(EvalState & state, Expr e,
 /* Specific results. */
 string evalString(EvalState & state, Expr e);
 Path evalPath(EvalState & state, Expr e);
+int evalInt(EvalState & state, Expr e);
 bool evalBool(EvalState & state, Expr e);
 ATermList evalList(EvalState & state, Expr e);
 ATerm coerceToString(Expr e);