Index: src/OGKDisplay.h
==================================================================
--- src/OGKDisplay.h
+++ src/OGKDisplay.h
@@ -30,11 +30,12 @@
 typedef enum ogk_display_flags_t {
 	OGK_DISPLAY_FLAGS_FULLSCREEN	= 0x01,
 	OGK_DISPLAY_FLAGS_RESIZABLE	= 0x02,
 	OGK_DISPLAY_FLAGS_OPENGL	= 0x04,
 	OGK_DISPLAY_FLAGS_OPENGL_3	= 0x08,
-	OGK_DISPLAY_FLAGS_OPENGL_3_ONLY	= 0x10
+	OGK_DISPLAY_FLAGS_OPENGL_3_ONLY	= 0x10,
+	OGK_DISPLAY_FLAGS_VSYNC		= 0x20
 } ogk_display_flags_t;
 
 @interface OGKDisplay: OFObject
 {
 	ALLEGRO_DISPLAY *display;

Index: src/OGKDisplay.m
==================================================================
--- src/OGKDisplay.m
+++ src/OGKDisplay.m
@@ -79,10 +79,15 @@
 	if (flags & OGK_DISPLAY_FLAGS_OPENGL_3)
 		allegroFlags |= ALLEGRO_OPENGL_3_0;
 	if (flags & OGK_DISPLAY_FLAGS_OPENGL_3_ONLY)
 		allegroFlags |= ALLEGRO_OPENGL_FORWARD_COMPATIBLE;
 
+	if (flags & OGK_DISPLAY_FLAGS_VSYNC)
+		al_set_new_display_option(ALLEGRO_VSYNC, 1, ALLEGRO_SUGGEST);
+	else
+		al_set_new_display_option(ALLEGRO_VSYNC, 0, ALLEGRO_SUGGEST);
+
 	al_set_new_display_flags(allegroFlags);
 	display = al_create_display(size.width, size.height);
 
 	if (display == NULL)
 		@throw [OFInitializationFailedException

Index: tests/TestMain.m
==================================================================
--- tests/TestMain.m
+++ tests/TestMain.m
@@ -85,11 +85,13 @@
 	[display update];
 }
 
 - (void)applicationDidFinishLaunching
 {
-	ogk_display_flags_t flags = OGK_DISPLAY_FLAGS_RESIZABLE;
+	ogk_display_flags_t flags =
+	    OGK_DISPLAY_FLAGS_RESIZABLE |
+	    OGK_DISPLAY_FLAGS_VSYNC;
 
 	display = [[OGKDisplay alloc] initWithSize: of_dimension(640, 480)
 					  position: of_point(200, 200)
 					     flags: flags];
 	display.size = of_dimension(800, 600);