diff --git a/sdl_opengl_bare.d b/sdl_opengl_bare.d
index 345cbdd..f052310 100644
--- a/sdl_opengl_bare.d
+++ b/sdl_opengl_bare.d
@@ -13,7 +13,7 @@ void init()
     glViewport(0, 0, WIDTH, HEIGHT);
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    gluPerspective(60.0, cast(GLfloat)WIDTH/cast(GLfloat)WIDTH, 1.0, 30.0);
+    gluPerspective(60.0, cast(GLfloat)WIDTH/cast(GLfloat)HEIGHT, 1.0, 30.0);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
     glTranslatef(0.0, 0.0, -10.0);