diff --git a/Haskell.gitignore b/Haskell.gitignore
index eee88b2f..82f3a88e 100644
--- a/Haskell.gitignore
+++ b/Haskell.gitignore
@@ -17,5 +17,6 @@ cabal.sandbox.config
 *.eventlog
 .stack-work/
 cabal.project.local
+cabal.project.local~
 .HTF/
 .ghc.environment.*