diff --git a/source/blender/windowmanager/intern/wm_splash_screen.cc b/source/blender/windowmanager/intern/wm_splash_screen.cc
index 92475e26e9a..3243832ed46 100644
--- a/source/blender/windowmanager/intern/wm_splash_screen.cc
+++ b/source/blender/windowmanager/intern/wm_splash_screen.cc
@@ -158,6 +158,7 @@ static ImBuf *wm_block_splash_image(int width, int *r_height)
   }
 
   if (ibuf) {
+    ibuf->planes = 32; /* The image might not have an alpha channel. */
     height = (width * ibuf->y) / ibuf->x;
     if (width != ibuf->x || height != ibuf->y) {
       IMB_scaleImBuf(ibuf, width, height);