diff --git a/source/app.d b/source/app.d
index 9da9003..226668b 100644
--- a/source/app.d
+++ b/source/app.d
@@ -62,7 +62,7 @@ void display(SDL_Window * window)
     glClear(GL_COLOR_BUFFER_BIT);
 
     view_matrix.make_identity();
-    view_matrix.rotate(SDL_GetTicks() / 500.0, vec3(0.0, 0.0, 1.0));
+    view_matrix.rotatez(SDL_GetTicks() / 500.0);
     glUniformMatrix4fv(view_idx, 1, GL_TRUE, view_matrix.value_ptr);
     glDrawElements(GL_TRIANGLE_FAN, 4, GL_UNSIGNED_SHORT, null);