diff --git a/include/window.h b/include/window.h
index 5046caa..23c6f05 100644
--- a/include/window.h
+++ b/include/window.h
@@ -60,5 +60,6 @@ void draw_line(const window_t *wnd, const line_t *ln, colour_t colour);
 void draw_triangle(const window_t *wnd, const triangle_t *triangle,
                    colour_t colour);
 void draw_rect(const window_t *wnd, const rect_t *rect, colour_t colour);
+void fill_rect(const window_t *wnd, const rect_t *rect, colour_t colour);
 
 #endif // !WINDOW_H
diff --git a/src/window.c b/src/window.c
index d248938..3d398e7 100644
--- a/src/window.c
+++ b/src/window.c
@@ -81,3 +81,11 @@ void draw_rect(const window_t *wnd, const rect_t *rect, colour_t colour) {
 
   SDL_RenderDrawRect(wnd->renderer, &dst);
 }
+
+void fill_rect(const window_t *wnd, const rect_t *rect, colour_t colour) {
+  set_colour(wnd, colour);
+
+  SDL_Rect dst = {rect->topleft.x, rect->topleft.y, rect->w, rect->h};
+
+  SDL_RenderFillRect(wnd->renderer, &dst);
+}