diff --git a/syntax/swift.vim b/syntax/swift.vim
index e39a0e2..fbb3045 100644
--- a/syntax/swift.vim
+++ b/syntax/swift.vim
@@ -20,6 +20,8 @@ syntax  match     swiftConstant     "let\s\zs\w*"
 
 syntax  region    swiftString       start=\"\ end=\"\
 syntax  region    swiftExpression   start="\\(\zs" end="\ze)" containedin=swiftString
+syntax  region    swiftComment      start="//" end="\n"
+syntax  region    swiftComment      start="/\*" end="\*/"
 
 highlight link    swiftKeyword        Keyword
 highlight link    swiftType           Type
@@ -31,4 +33,5 @@ highlight link    swiftConstant       String
 
 highlight link    swiftString         String
 highlight link    swiftExpression     Identifier
+highlight link    SwiftComment        Normal