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-rw-r--r--src/libexpr/eval.cc8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index cef346002962..d4593b5c0ec0 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -328,11 +328,11 @@ Expr evalExpr2(EvalState & state, Expr e)
         e2 = evalExpr(state, e2);
         ATerm s1, s2;
         if (matchStr(e1, s1) && matchStr(e2, s2))
-            return makeStr(string2ATerm((
-                (string) aterm2String(s1) + (string) aterm2String(s2)).c_str()));
+            return makeStr(toATerm(
+                (string) aterm2String(s1) + (string) aterm2String(s2)));
         else if (matchPath(e1, s1) && matchPath(e2, s2))
-            return makePath(string2ATerm(canonPath(
-                (string) aterm2String(s1) + "/" + (string) aterm2String(s2)).c_str()));
+            return makePath(toATerm(canonPath(
+                (string) aterm2String(s1) + "/" + (string) aterm2String(s2))));
         else throw Error("wrong argument types in `+' operator");
     }