diff --git a/lib/lexer.js b/lib/lexer.js
index cb45c2cf..92b3ebdc 100644
--- a/lib/lexer.js
+++ b/lib/lexer.js
@@ -595,7 +595,7 @@
   })();
   JS_KEYWORDS = ['if', 'else', 'true', 'false', 'new', 'return', 'try', 'catch', 'finally', 'throw', 'break', 'continue', 'for', 'in', 'while', 'delete', 'instanceof', 'typeof', 'switch', 'super', 'extends', 'class', 'this', 'null', 'debugger'];
   COFFEE_ALIASES = ['and', 'or', 'is', 'isnt', 'not'];
-  COFFEE_KEYWORDS = COFFEE_ALIASES.concat(['then', 'unless', 'until', 'loop', 'yes', 'no', 'on', 'off', 'of', 'by', 'where', 'when']);
+  COFFEE_KEYWORDS = COFFEE_ALIASES.concat(['then', 'unless', 'until', 'loop', 'yes', 'no', 'on', 'off', 'of', 'by', 'when']);
   RESERVED = ['case', 'default', 'do', 'function', 'var', 'void', 'with', 'const', 'let', 'enum', 'export', 'import', 'native', '__hasProp', '__extends', '__slice'];
   JS_FORBIDDEN = JS_KEYWORDS.concat(RESERVED);
   IDENTIFIER = /^[a-zA-Z_$][\w$]*/;
diff --git a/src/lexer.coffee b/src/lexer.coffee
index 20952752..9da8f796 100644
--- a/src/lexer.coffee
+++ b/src/lexer.coffee
@@ -515,7 +515,7 @@ COFFEE_ALIASES =  ['and', 'or', 'is', 'isnt', 'not']
 COFFEE_KEYWORDS = COFFEE_ALIASES.concat [
   'then', 'unless', 'until', 'loop'
   'yes', 'no', 'on', 'off'
-  'of', 'by', 'where', 'when'
+  'of', 'by', 'when'
 ]
 
 # The list of keywords that are reserved by JavaScript, but not used, or are
diff --git a/test/test_pattern_matching.coffee b/test/test_pattern_matching.coffee
index e9243386..69389152 100644
--- a/test/test_pattern_matching.coffee
+++ b/test/test_pattern_matching.coffee
@@ -141,7 +141,7 @@ deepEqual join2, join3
 
 # Pattern matching doesn't clash with implicit block objects.
 obj = a: 101
-func -> true
+func = -> true
 
 if func func
   {a} = obj