diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index b860b48be..1862fa267 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -21,7 +21,7 @@ namespace nix {
 
 
 MakeError(SubstError, Error);
-MakeError(BuildError, Error) /* denotes a permanent build failure */;
+MakeError(BuildError, Error); // denotes a permanent build failure
 MakeError(InvalidPath, Error);
 MakeError(Unsupported, Error);
 MakeError(SubstituteGone, Error);