diff --git a/core/options.vim b/core/options.vim
index b62691a..4800474 100644
--- a/core/options.vim
+++ b/core/options.vim
@@ -179,6 +179,7 @@ set isfname-=,
 set diffopt=
 set diffopt+=vertical  " show diff in vertical position
 set diffopt+=filler  " show filler for deleted lines
+set diffopt+=closeoff  " turn off diff when one file window is closed
 set diffopt+=context:3  " context for diff
 set diffopt+=internal,indent-heuristic,algorithm:histogram
 "}