diff --git a/vim/.vim/after/ftplugin/bash.vim b/vim/.vim/after/ftplugin/bash.vim
index 93ca934..ba61116 100644
--- a/vim/.vim/after/ftplugin/bash.vim
+++ b/vim/.vim/after/ftplugin/bash.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use shfmt as ALE fixer for bash
 let b:ale_fixers=[ 'shfmt' ]
 let b:undo_ftplugin.='|unlet b:ale_fixers'
diff --git a/vim/.vim/after/ftplugin/c.vim b/vim/.vim/after/ftplugin/c.vim
index ca4a3ef..70c9c27 100644
--- a/vim/.vim/after/ftplugin/c.vim
+++ b/vim/.vim/after/ftplugin/c.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " More warnings and the usual version in flags for Clang
 let b:ale_c_clang_options='-Wall -Wextra -pedantic -std=c99'
 let b:undo_ftplugin.='|unlet b:ale_c_clang_options'
diff --git a/vim/.vim/after/ftplugin/cpp.vim b/vim/.vim/after/ftplugin/cpp.vim
index eac9ade..81fd012 100644
--- a/vim/.vim/after/ftplugin/cpp.vim
+++ b/vim/.vim/after/ftplugin/cpp.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " More warnings and the usual version in flags for Clang
 let b:ale_cpp_clang_options='-Wall -Wextra -pedantic -std=c++17'
 let b:undo_ftplugin.='|unlet b:ale_cpp_clang_options'
diff --git a/vim/.vim/after/ftplugin/d.vim b/vim/.vim/after/ftplugin/d.vim
index 4ade9e2..a9e13dc 100644
--- a/vim/.vim/after/ftplugin/d.vim
+++ b/vim/.vim/after/ftplugin/d.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use my desired ALE fixer for D
 let b:ale_fixers=[ 'dfmt' ]
 let b:undo_ftplugin.='|unlet b:ale_fixers'
diff --git a/vim/.vim/after/ftplugin/fugitive.vim b/vim/.vim/after/ftplugin/fugitive.vim
index 73f936e..40e791f 100644
--- a/vim/.vim/after/ftplugin/fugitive.vim
+++ b/vim/.vim/after/ftplugin/fugitive.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Don't highlight trailing whitespace in fugitive windows
 let b:better_whitespace_enabled=0
 let b:undo_ftplugin.='|unlet b:better_whitespace_enabled'
diff --git a/vim/.vim/after/ftplugin/gitcommit.vim b/vim/.vim/after/ftplugin/gitcommit.vim
index 786a668..478a1b6 100644
--- a/vim/.vim/after/ftplugin/gitcommit.vim
+++ b/vim/.vim/after/ftplugin/gitcommit.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Enable spell checking on commit messages
 setlocal spell
 let b:undo_ftplugin.='|setlocal spell<'
diff --git a/vim/.vim/after/ftplugin/json.vim b/vim/.vim/after/ftplugin/json.vim
index af3cb2b..f6d443b 100644
--- a/vim/.vim/after/ftplugin/json.vim
+++ b/vim/.vim/after/ftplugin/json.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use my desired ALE fixer for JSON
 let b:ale_fixers=[ 'jq' ]
 let b:undo_ftplugin.='|unlet b:ale_fixers'
diff --git a/vim/.vim/after/ftplugin/make.vim b/vim/.vim/after/ftplugin/make.vim
index 1bcd00b..848c308 100644
--- a/vim/.vim/after/ftplugin/make.vim
+++ b/vim/.vim/after/ftplugin/make.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Makefiles should use tabs to indent
 setlocal noexpandtab
 let b:undo_ftplugin.='|setlocal noexpandtab<'
diff --git a/vim/.vim/after/ftplugin/netrw.vim b/vim/.vim/after/ftplugin/netrw.vim
index f676d21..d907f44 100644
--- a/vim/.vim/after/ftplugin/netrw.vim
+++ b/vim/.vim/after/ftplugin/netrw.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Don't show Netrw in buffer list
 setlocal bufhidden=delete
 let b:undo_ftplugin='|setlocal bufhidden<'
diff --git a/vim/.vim/after/ftplugin/pandoc.vim b/vim/.vim/after/ftplugin/pandoc.vim
index e96f98b..9aa0d8b 100644
--- a/vim/.vim/after/ftplugin/pandoc.vim
+++ b/vim/.vim/after/ftplugin/pandoc.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Let ALE know that I want Markdown linters
 let b:ale_linter_aliases=[ 'markdown' ]
 let b:undo_ftplugin.='|unlet b:ale_linter_aliases'
diff --git a/vim/.vim/after/ftplugin/python.vim b/vim/.vim/after/ftplugin/python.vim
index c3687da..0347fcc 100644
--- a/vim/.vim/after/ftplugin/python.vim
+++ b/vim/.vim/after/ftplugin/python.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use my desired ALE fixers for python
 let b:ale_fixers=[ 'black', 'isort' ]
 let b:undo_ftplugin.='|unlet b:ale_fixers'
diff --git a/vim/.vim/after/ftplugin/qf.vim b/vim/.vim/after/ftplugin/qf.vim
index 4947593..a4cf9a6 100644
--- a/vim/.vim/after/ftplugin/qf.vim
+++ b/vim/.vim/after/ftplugin/qf.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use h/l to go to the previous/next non-empty quickfix or location list
 nnoremap <silent> <buffer> h :call quickfixed#older()<CR>
 let b:undo_ftplugin.='|nunmap <buffer> h'
diff --git a/vim/.vim/after/ftplugin/rust.vim b/vim/.vim/after/ftplugin/rust.vim
index a178d87..35472f6 100644
--- a/vim/.vim/after/ftplugin/rust.vim
+++ b/vim/.vim/after/ftplugin/rust.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Check tests too
 let b:ale_rust_cargo_check_tests=1
 let b:undo_ftplugin='|unlet b:ale_rust_cargo_check_tests'
diff --git a/vim/.vim/after/ftplugin/sh.vim b/vim/.vim/after/ftplugin/sh.vim
index e038c78..4cd9e82 100644
--- a/vim/.vim/after/ftplugin/sh.vim
+++ b/vim/.vim/after/ftplugin/sh.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use shfmt as ALE fixer for sh
 let b:ale_fixers=[ 'shfmt' ]
 let b:undo_ftplugin.='|unlet b:ale_fixers'
diff --git a/vim/.vim/after/ftplugin/zsh.vim b/vim/.vim/after/ftplugin/zsh.vim
index 7cc0b5f..f0f811f 100644
--- a/vim/.vim/after/ftplugin/zsh.vim
+++ b/vim/.vim/after/ftplugin/zsh.vim
@@ -1,3 +1,7 @@
+if !exists("b:undo_ftplugin")
+    let b:undo_ftplugin=''
+endif
+
 " Use shfmt as ALE fixer for zsh
 let b:ale_fixers=[ 'shfmt' ]
 let b:undo_ftplugin.='|unlet b:ale_fixers'