diff --git a/docs/CHANGES.txt b/docs/CHANGES.txt
index 507739065..664d8e885 100644
--- a/docs/CHANGES.txt
+++ b/docs/CHANGES.txt
@@ -7,7 +7,7 @@ Various contributors (see below, and AUTHORS.txt)
 http://www.tuxpaint.org/
 
 
-2022.September.2 (0.9.29)
+2022.September.4 (0.9.29)
   * Improvements to "Stamp" tool:
     -----------------------------
     * WIP - Stamps may now be rotated.
@@ -17,6 +17,12 @@ http://www.tuxpaint.org/
 
   * Bug Fixes:
     ----------
+    * Always creating 24-bit canvases, in an attempt to avoid blending
+      artifacts, e.g., when applying brush strokes using the Paint tool.
+      (Previously, we were using the display's color depth and masks,
+      which seemed to work fine under SDL1.2, but does not under SDL2.)
+      Closes https://sourceforge.net/p/tuxpaint/bugs/259/
+
     * Opening and immediately dismissing Color Mixer could cause
       an unexpected color to be chosen.
       h/t @kentonyanamin on Twitter for reporting.
diff --git a/src/tuxpaint.c b/src/tuxpaint.c
index dce9e1e3a..16a82561d 100644
--- a/src/tuxpaint.c
+++ b/src/tuxpaint.c
@@ -28079,13 +28079,15 @@ static void setup(void)
   printf("Canvas size is %d x %d\n", canvas_width, canvas_height);
 #endif
 
-  canvas = SDL_CreateRGBSurface(screen->flags, canvas_width, canvas_height,
-                                screen->format->BitsPerPixel,
-                                screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, 0);
+  /* Per https://wiki.libsdl.org/SDL_CreateRGBSurface,
+     * the flags are unused and should be set to 0
+     * Using zeros for the RGB masks sets a default value, based on the depth.
+  */
+  canvas = SDL_CreateRGBSurface(0, canvas_width, canvas_height,
+                                24, 0, 0, 0, 0);
 
-  save_canvas = SDL_CreateRGBSurface(screen->flags, canvas_width, canvas_height,
-                                     screen->format->BitsPerPixel,
-                                     screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, 0);
+  save_canvas = SDL_CreateRGBSurface(0, canvas_width, canvas_height,
+                                24, 0, 0, 0, 0);
 
 
   img_starter = NULL;