diff --git a/src/SDL2.cs b/src/SDL2.cs
index be1f8d2..e81797d 100644
--- a/src/SDL2.cs
+++ b/src/SDL2.cs
@@ -1943,6 +1943,14 @@ namespace SDL2
 			ref SDL_DisplayMode mode
 		);
 
+		/* window refers to an SDL_Window* */
+		/* NULL overload - use the window's dimensions and the desktop's format and refresh rate */
+		[DllImport(nativeLibName, CallingConvention = CallingConvention.Cdecl)]
+		public static extern int SDL_SetWindowDisplayMode(
+			IntPtr window,
+			IntPtr mode
+		);
+
 		/* window refers to an SDL_Window* */
 		[DllImport(nativeLibName, CallingConvention = CallingConvention.Cdecl)]
 		public static extern int SDL_SetWindowFullscreen(