diff --git a/src/patrix/display/Display.h b/src/patrix/display/Display.h
index 0250198..99a766a 100644
--- a/src/patrix/display/Display.h
+++ b/src/patrix/display/Display.h
@@ -115,22 +115,22 @@ public:
     for (auto t = 0; t < thickness; ++t) {
       const auto offset = t % 2 == 0 ? t / 2 : -t / 2;
       if (h == 0) {
-        for (auto x = x0; x < x0 + w; ++x) {
+        for (auto x = x0; x <= x0 + w; ++x) {
           setPixel(x, y0, color);
         }
       } else if (w == 0) {
-        for (auto y = y0; y < y0 + h; ++y) {
+        for (auto y = y0; y <= y0 + h; ++y) {
           setPixel(x0, y, color);
         }
       } else if (w >= h) {
         const auto m = static_cast<double>(h) / w;
-        for (auto x = x0; x < x0 + w; ++x) {
+        for (auto x = x0; x <= x0 + w; ++x) {
           const auto y = static_cast<int>(round(offset + x * m));
           setPixel(x, y, color);
         }
       } else {
         const auto m = static_cast<double>(w) / h;
-        for (auto y = y0; y < y0 + h; ++y) {
+        for (auto y = y0; y <= y0 + h; ++y) {
           const auto x = static_cast<int>(round(offset + y * m));
           setPixel(x, y, color);
         }