1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix/edit.cc b/src/nix/edit.cc
index c62b35c46..632a99d11 100644
--- a/src/nix/edit.cc
+++ b/src/nix/edit.cc
@@ -50,7 +50,7 @@ struct CmdEdit : InstallableCommand
         int lineno;
         try {
             lineno = std::stoi(std::string(pos, colon + 1));
-        } catch (std::invalid_argument e) {
+        } catch (std::invalid_argument & e) {
             throw Error("cannot parse line number '%s'", pos);
         }