diff --git a/src/etc/gedit/share/gtksourceview-3.0/language-specs/rust.lang b/src/etc/gedit/share/gtksourceview-3.0/language-specs/rust.lang
index 43700c02b75f4..8864012970845 100644
--- a/src/etc/gedit/share/gtksourceview-3.0/language-specs/rust.lang
+++ b/src/etc/gedit/share/gtksourceview-3.0/language-specs/rust.lang
@@ -87,7 +87,6 @@
 		<keyword>f64</keyword>
 		<keyword>char</keyword>
 		<keyword>str</keyword>
-		<keyword>Either</keyword>
 		<keyword>Option</keyword>
 		<keyword>Result</keyword>
     </context>
@@ -134,8 +133,6 @@
 		<keyword>false</keyword>
 		<keyword>Some</keyword>
 		<keyword>None</keyword>
-		<keyword>Left</keyword>
-		<keyword>Right</keyword>
 		<keyword>Ok</keyword>
 		<keyword>Err</keyword>
 		<keyword>Success</keyword>
diff --git a/src/etc/kate/rust.xml b/src/etc/kate/rust.xml
index c1c5215ac0ff0..c52473f5f0728 100644
--- a/src/etc/kate/rust.xml
+++ b/src/etc/kate/rust.xml
@@ -86,7 +86,6 @@
 		<item> float </item>
 		<item> char </item>
 		<item> str </item>
-		<item> Either </item>
 		<item> Option </item>
 		<item> Result </item>
 		<item> Self </item>
@@ -131,8 +130,6 @@
 		<item> false </item>
 		<item> Some </item>
 		<item> None </item>
-		<item> Left </item>
-		<item> Right </item>
 		<item> Ok </item>
 		<item> Err </item>
 		<item> Success </item>
diff --git a/src/etc/vim/syntax/rust.vim b/src/etc/vim/syntax/rust.vim
index 3b300b4cc2825..dbdb2949b932a 100644
--- a/src/etc/vim/syntax/rust.vim
+++ b/src/etc/vim/syntax/rust.vim
@@ -46,8 +46,6 @@ syn keyword   rustType        f64 i8 i16 i32 i64 str Self
 " to make it easy to update.
 
 " Core operators {{{3
-syn keyword   rustEnum        Either
-syn keyword   rustEnumVariant Left Right
 syn keyword   rustTrait       Sized
 syn keyword   rustTrait       Freeze Send
 syn keyword   rustTrait       Add Sub Mul Div Rem Neg Not
@@ -113,7 +111,6 @@ syn keyword   rustSelf        self
 syn keyword   rustBoolean     true false
 
 syn keyword   rustConstant    Some None       " option
-syn keyword   rustConstant    Left Right      " either
 syn keyword   rustConstant    Ok Err          " result
 syn keyword   rustConstant    Less Equal Greater " Ordering