diff --git a/src/blitter/32bpp_anim.cpp b/src/blitter/32bpp_anim.cpp
index 353afa14ac..a3083e40b3 100644
--- a/src/blitter/32bpp_anim.cpp
+++ b/src/blitter/32bpp_anim.cpp
@@ -180,8 +180,8 @@ inline void Blitter_32bppAnim::Draw(const Blitter::BlitterParams *bp, ZoomLevel
 					do {
 						*dst++ = Colour(0, 0, 0);
 						*anim++ = 0;
-						anim++;
-						dst++;
+						src_px++;
+						src_n++;
 					} while (--n != 0);
 					break;