From 426ad8307dd6220a1158a7f895bdc371c5343356 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Thu, 8 Jan 2026 19:27:19 +1100
Subject: [PATCH] Fix joining rounded rectangle corners

---
 .../images/imagedraw_rounded_rectangle_radius.png | Bin 0 -> 456 bytes
 Tests/test_imagedraw.py                           |  12 ++++++++++++
 src/PIL/ImageDraw.py                              |   2 +-
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 Tests/images/imagedraw_rounded_rectangle_radius.png

diff --git a/Tests/images/imagedraw_rounded_rectangle_radius.png b/Tests/images/imagedraw_rounded_rectangle_radius.png
new file mode 100644
index 0000000000000000000000000000000000000000..e2acf7be1b16f947afabda958c9ff8c7644fa15c
GIT binary patch
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diff --git a/Tests/test_imagedraw.py b/Tests/test_imagedraw.py
index 3c61833fe..1eae05383 100644
--- a/Tests/test_imagedraw.py
+++ b/Tests/test_imagedraw.py
@@ -895,6 +895,18 @@ def test_rounded_rectangle_joined_x_different_corners() -> None:
     )
 
 
+def test_rounded_rectangle_radius() -> None:
+    # Arrange
+    im = Image.new("RGB", (W, H))
+    draw = ImageDraw.Draw(im, "RGB")
+
+    # Act
+    draw.rounded_rectangle((25, 25, 75, 75), 24, fill="red", outline="green", width=5)
+
+    # Assert
+    assert_image_equal_tofile(im, "Tests/images/imagedraw_rounded_rectangle_radius.png")
+
+
 @pytest.mark.parametrize(
     "xy, radius, type",
     [
diff --git a/src/PIL/ImageDraw.py b/src/PIL/ImageDraw.py
index 8bcf2d8ee..eb108ac41 100644
--- a/src/PIL/ImageDraw.py
+++ b/src/PIL/ImageDraw.py
@@ -487,7 +487,7 @@ class ImageDraw:
 
             if full_x:
                 self.draw.draw_rectangle((x0, y0 + r + 1, x1, y1 - r - 1), fill_ink, 1)
-            elif x1 - r - 1 > x0 + r + 1:
+            elif x1 - r - 1 >= x0 + r + 1:
                 self.draw.draw_rectangle((x0 + r + 1, y0, x1 - r - 1, y1), fill_ink, 1)
             if not full_x and not full_y:
                 left = [x0, y0, x0 + r, y1]