Index: src/OGKDisplay.h
==================================================================
--- src/OGKDisplay.h
+++ src/OGKDisplay.h
@@ -16,13 +16,18 @@
  *   2.) Altered source versions must be plainly marked as such, and must not
  *       be misrepresented as being the original software.
  *   3.) This notice may not be removed or altered from any source distribution.
  */
 
+/* For NAN */
+#include <math.h>
+
 #include <allegro5/allegro.h>
 
 #import <ObjFW/ObjFW.h>
+
+#define OGK_DISPLAY_POSITION_DEFAULT of_point(NAN, NAN)
 
 typedef enum ogk_display_flags_t {
 	OGK_DISPLAY_FLAGS_FULLSCREEN	= 0x01,
 	OGK_DISPLAY_FLAGS_RESIZABLE	= 0x02,
 	OGK_DISPLAY_FLAGS_OPENGL	= 0x04,

Index: src/OGKDisplay.m
==================================================================
--- src/OGKDisplay.m
+++ src/OGKDisplay.m
@@ -63,11 +63,14 @@
 {
 	int allegroFlags = 0;
 
 	self = [super init];
 
-	al_set_new_window_position(position.x, position.y);
+	if (isnan(position.x) || isnan(position.y))
+		al_set_new_window_position(INT_MAX, INT_MAX);
+	else
+		al_set_new_window_position(position.x, position.y);
 
 	if (flags & OGK_DISPLAY_FLAGS_FULLSCREEN)
 		allegroFlags |= ALLEGRO_FULLSCREEN;
 	if (flags & OGK_DISPLAY_FLAGS_RESIZABLE)
 		allegroFlags |= ALLEGRO_RESIZABLE;
@@ -126,10 +129,13 @@
 - (of_point_t)windowPosition
 {
 	int x, y;
 
 	al_get_window_position(display, &x, &y);
+
+	if (x == INT_MAX && y == INT_MAX)
+		return of_point(NAN, NAN);
 
 	return of_point(x, y);
 }
 
 - (void)setSize: (of_dimension_t)size