diff --git a/helper/haxe-argument.YAML-tmLanguage b/helper/haxe-argument.YAML-tmLanguage
new file mode 100644
index 0000000..7d851c5
--- /dev/null
+++ b/helper/haxe-argument.YAML-tmLanguage
@@ -0,0 +1,36 @@
+patterns:
+# can't just use 'source.hx#parameter' because of the lookarounds it has
+- include: '#parameter'
+repository:
+  parameter:
+    patterns:
+    - include: '#parameter-name'
+    - include: '#parameter-type-hint'
+    - include: '#parameter-assign'
+    - include: 'source.hx#punctuation-comma'
+    - include: 'source.hx#global'
+  parameter-name:
+    begin: ^
+    end: ([_a-zA-Z]\w*)
+    endCaptures:
+      '1': {name: variable.parameter.hx}
+    patterns:
+    - include: 'source.hx#global'
+    - include: 'source.hx#metadata'
+    - include: 'source.hx#operator-optional'
+  parameter-type-hint:
+    begin: ':'
+    beginCaptures:
+      '0': {name: keyword.operator.type.annotation.hx}
+    end: (?=\)(?!\s*->)|,|=)
+    patterns:
+    - include: 'source.hx#type'
+  parameter-assign:
+    begin: '='
+    beginCaptures:
+      '0': {name: keyword.operator.assignment.hx}
+    end: $
+    patterns:
+    - include: 'source.hx#block'
+    - include: 'source.hx#block-contents'
+scopeName: source.hx.argument
diff --git a/helper/haxe-argument.tmLanguage b/helper/haxe-argument.tmLanguage
new file mode 100644
index 0000000..e4f8a69
--- /dev/null
+++ b/helper/haxe-argument.tmLanguage
@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist><dict><key>scopeName</key><string>source.hx.argument</string><key>repository</key><dict><key>parameter</key><dict><key>patterns</key><array><dict><key>include</key><string>#parameter-name</string></dict><dict><key>include</key><string>#parameter-type-hint</string></dict><dict><key>include</key><string>#parameter-assign</string></dict><dict><key>include</key><string>source.hx#punctuation-comma</string></dict><dict><key>include</key><string>source.hx#global</string></dict></array></dict><key>parameter-type-hint</key><dict><key>end</key><string>(?=\)(?!\s*-&gt;)|,|=)</string><key>beginCaptures</key><dict><key>0</key><dict><key>name</key><string>keyword.operator.type.annotation.hx</string></dict></dict><key>begin</key><string>:</string><key>patterns</key><array><dict><key>include</key><string>source.hx#type</string></dict></array></dict><key>parameter-name</key><dict><key>endCaptures</key><dict><key>1</key><dict><key>name</key><string>variable.parameter.hx</string></dict></dict><key>end</key><string>([_a-zA-Z]\w*)</string><key>begin</key><string>^</string><key>patterns</key><array><dict><key>include</key><string>source.hx#global</string></dict><dict><key>include</key><string>source.hx#metadata</string></dict><dict><key>include</key><string>source.hx#operator-optional</string></dict></array></dict><key>parameter-assign</key><dict><key>end</key><string>$</string><key>beginCaptures</key><dict><key>0</key><dict><key>name</key><string>keyword.operator.assignment.hx</string></dict></dict><key>begin</key><string>=</string><key>patterns</key><array><dict><key>include</key><string>source.hx#block</string></dict><dict><key>include</key><string>source.hx#block-contents</string></dict></array></dict></dict><key>patterns</key><array><dict><key>include</key><string>#parameter</string></dict></array></dict></plist>
\ No newline at end of file
diff --git a/helper/haxe-type.YAML-tmLanguage b/helper/haxe-type.YAML-tmLanguage
index 2956fb4..a75039e 100644
--- a/helper/haxe-type.YAML-tmLanguage
+++ b/helper/haxe-type.YAML-tmLanguage
@@ -1,3 +1,3 @@
 patterns:
 - include: 'source.hx#type'
-scopeName: source.hx.type
\ No newline at end of file
+scopeName: source.hx.type
diff --git a/src/Converter.hx b/src/Converter.hx
index 8c3b5f6..6472625 100644
--- a/src/Converter.hx
+++ b/src/Converter.hx
@@ -8,6 +8,7 @@ class Converter {
         convert("hxml.YAML-tmLanguage", "hxml.tmLanguage");
 
         convert("helper/haxe-type.YAML-tmLanguage", "helper/haxe-type.tmLanguage");
+        convert("helper/haxe-argument.YAML-tmLanguage", "helper/haxe-argument.tmLanguage");
         convert("helper/haxe-markdown.YAML-tmLanguage", "helper/haxe-markdown.tmLanguage");
         convert("helper/hxml-markdown.YAML-tmLanguage", "helper/hxml-markdown.tmLanguage");