diff --git a/ui.h b/ui.h
index b5fb9a27..b5330336 100644
--- a/ui.h
+++ b/ui.h
@@ -130,7 +130,7 @@ _UI_EXTERN void uiWindowSetBorderless(uiWindow *w, int borderless);
 _UI_EXTERN void uiWindowSetChild(uiWindow *w, uiControl *child);
 _UI_EXTERN int uiWindowMargined(uiWindow *w);
 _UI_EXTERN void uiWindowSetMargined(uiWindow *w, int margined);
-_UI_EXTERN uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar);
+_UI_EXTERN uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar, int resizable);
 
 typedef struct uiButton uiButton;
 #define uiButton(this) ((uiButton *) (this))
diff --git a/unix/window.c b/unix/window.c
index c5ba2038..83841e7b 100644
--- a/unix/window.c
+++ b/unix/window.c
@@ -229,7 +229,7 @@ void uiWindowSetMargined(uiWindow *w, int margined)
 	uiprivSetMargined(w->childHolderContainer, w->margined);
 }
 
-uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
+uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar, int resizable)
 {
 	uiWindow *w;
 
@@ -275,5 +275,7 @@ uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
 	// TODO we really need to clean this up, especially since see uiWindowDestroy() above
 	g_object_ref(w->widget);
 
+	gtk_window_set_resizable(w->window, resizable?TRUE:FALSE);
+
 	return w;
 }
diff --git a/windows/window.cpp b/windows/window.cpp
index 2ea5b7ce..ef2933a2 100644
--- a/windows/window.cpp
+++ b/windows/window.cpp
@@ -452,7 +452,7 @@ static void setClientSize(uiWindow *w, int width, int height, BOOL hasMenubar, D
 		logLastError(L"error resizing window");
 }
 
-uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
+uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar, int resizable)
 {
 	uiWindow *w;
 	WCHAR *wtitle;
@@ -465,8 +465,11 @@ uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
 		hasMenubarBOOL = TRUE;
 	w->hasMenubar = hasMenubarBOOL;
 
-#define style WS_OVERLAPPEDWINDOW
-#define exstyle 0
+	int style = WS_OVERLAPPEDWINDOW;
+	int exstyle = 0;
+
+	if (!resizable)
+		style &= ~(WS_THICKFRAME | WS_MAXIMIZEBOX);
 
 	wtitle = toUTF16(title);
 	w->hwnd = CreateWindowExW(exstyle,