1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix/edit.cc b/src/nix/edit.cc
index c9671f76d..a6169f118 100644
--- a/src/nix/edit.cc
+++ b/src/nix/edit.cc
@@ -55,7 +55,7 @@ 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);
         }