diff --git a/ahk/_async/engine.py b/ahk/_async/engine.py
index 0aa064d..b7dde23 100644
--- a/ahk/_async/engine.py
+++ b/ahk/_async/engine.py
@@ -2901,7 +2901,7 @@ async def mouse_drag(
         *,
         from_position: Optional[Tuple[int, int]] = None,
         speed: Optional[int] = None,
-        button: MouseButton = 1,
+        button: MouseButton = 'left',
         relative: Optional[bool] = None,
         blocking: bool = True,
         coord_mode: Optional[CoordModeRelativeTo] = None,
@@ -2927,6 +2927,8 @@ async def mouse_drag(
 
         if coord_mode:
             args.append(coord_mode)
+        else:
+            args.append('')
 
         await self._transport.function_call('AHKMouseClickDrag', args, blocking=blocking)
 
diff --git a/ahk/_constants.py b/ahk/_constants.py
index 0686deb..4158936 100644
--- a/ahk/_constants.py
+++ b/ahk/_constants.py
@@ -4815,7 +4815,17 @@
         CoordMode("Mouse", relative_to)
     }
 
-    MouseClickDrag(button, x1, y1, x2, y2, speed, relative)
+    if (speed = "") {
+        speed := A_DefaultMouseSpeed
+    }
+
+    if (x1 = "" and y1 = "") {
+        MouseClickDrag(button, , , x2, y2, speed, relative)
+    }
+    else {
+        MouseClickDrag(button, x1, y1, x2, y2, speed, relative)
+    }
+
 
     if (relative_to != "") {
         CoordMode("Mouse", current_coord_rel)
diff --git a/ahk/_sync/engine.py b/ahk/_sync/engine.py
index 57505a9..d383932 100644
--- a/ahk/_sync/engine.py
+++ b/ahk/_sync/engine.py
@@ -2889,7 +2889,7 @@ def mouse_drag(
         *,
         from_position: Optional[Tuple[int, int]] = None,
         speed: Optional[int] = None,
-        button: MouseButton = 1,
+        button: MouseButton = 'left',
         relative: Optional[bool] = None,
         blocking: bool = True,
         coord_mode: Optional[CoordModeRelativeTo] = None,
@@ -2915,6 +2915,8 @@ def mouse_drag(
 
         if coord_mode:
             args.append(coord_mode)
+        else:
+            args.append('')
 
         self._transport.function_call('AHKMouseClickDrag', args, blocking=blocking)
 
diff --git a/ahk/templates/daemon-v2.ahk b/ahk/templates/daemon-v2.ahk
index 37d5915..2742a6f 100644
--- a/ahk/templates/daemon-v2.ahk
+++ b/ahk/templates/daemon-v2.ahk
@@ -1896,7 +1896,17 @@ AHKMouseClickDrag(args*) {
         CoordMode("Mouse", relative_to)
     }
 
-    MouseClickDrag(button, x1, y1, x2, y2, speed, relative)
+    if (speed = "") {
+        speed := A_DefaultMouseSpeed
+    }
+
+    if (x1 = "" and y1 = "") {
+        MouseClickDrag(button, , , x2, y2, speed, relative)
+    }
+    else {
+        MouseClickDrag(button, x1, y1, x2, y2, speed, relative)
+    }
+
 
     if (relative_to != "") {
         CoordMode("Mouse", current_coord_rel)