diff --git a/model_window.go b/model_window.go
index 53d8ce9..c2429d8 100644
--- a/model_window.go
+++ b/model_window.go
@@ -3,30 +3,40 @@ package hypr
 import "encoding/json"
 
 type Window struct {
-	Address        string         `json:"address"`
-	Mapped         bool           `json:"mapped"`
-	Hidden         bool           `json:"hidden"`
-	At             [2]int         `json:"at"`
-	Size           [2]int         `json:"size"`
-	Workspace      WorkspaceIdent `json:"workspace"`
-	Floating       bool           `json:"floating"`
-	MonitorID      int            `json:"monitor"`
-	Class          string         `json:"class"`
-	Title          string         `json:"title"`
-	InitialClass   string         `json:"initialClass"`
-	InitialTitle   string         `json:"initialTitle"`
-	PID            int            `json:"pid"`
-	Xwayland       bool           `json:"xwayland"`
-	Pinned         bool           `json:"pinned"`
-	Fullscreen     bool           `json:"fullscreen"`
-	FullscreenMode int            `json:"fullscreenMode"`
-	FakeFullscreen bool           `json:"fakeFullscreen"`
-	Grouped        []interface{}  `json:"grouped"` // TODO
-	Swallowing     string         `json:"swallowing"`
-	FocusHistoryID int            `json:"focusHistoryID"`
+	Address          string          `json:"address"`
+	Mapped           bool            `json:"mapped"`
+	Hidden           bool            `json:"hidden"`
+	At               [2]int          `json:"at"`
+	Size             [2]int          `json:"size"`
+	Workspace        WorkspaceIdent  `json:"workspace"`
+	Floating         bool            `json:"floating"`
+	MonitorID        int             `json:"monitor"`
+	Class            string          `json:"class"`
+	Title            string          `json:"title"`
+	InitialClass     string          `json:"initialClass"`
+	InitialTitle     string          `json:"initialTitle"`
+	PID              int             `json:"pid"`
+	Xwayland         bool            `json:"xwayland"`
+	Pinned           bool            `json:"pinned"`
+	Fullscreen       FullscreenState `json:"fullscreen"`
+	FullscreenClient FullscreenState `json:"fullscreenClient"`
+	FakeFullscreen   bool            `json:"fakeFullscreen"`
+	Grouped          []interface{}   `json:"grouped"` // TODO
+	Swallowing       string          `json:"swallowing"`
+	FocusHistoryID   int             `json:"focusHistoryID"`
 }
 
 func (w Window) String() string {
 	data, _ := json.MarshalIndent(w, "", "\t")
 	return string(data)
 }
+
+type FullscreenState int
+
+const (
+	FullscreenCurrent            FullscreenState = -1
+	FullscreenNone               FullscreenState = 0
+	FullscreenMaximize           FullscreenState = 1
+	FullscreenFullscreen         FullscreenState = 2
+	FullscreenMaximizeFullscreen FullscreenState = 3
+)