diff --git a/src/blitter/32bpp_sse4.cpp b/src/blitter/32bpp_sse4.cpp
--- a/src/blitter/32bpp_sse4.cpp
+++ b/src/blitter/32bpp_sse4.cpp
@@ -84,7 +84,7 @@ inline void Blitter_32bppSSE4::Draw(cons
 							src += 2;
 							dst += 2;
 						}
-						if (bt_last == BT_ODD) {
+						if ((bt_last == BT_NONE && effective_width & 1) || bt_last == BT_ODD) {
 							__m128i srcABCD = _mm_cvtsi32_si128(src->data);
 							__m128i dstABCD = _mm_cvtsi32_si128(dst->data);
 							ALPHA_BLEND_2();
@@ -153,7 +153,7 @@ inline void Blitter_32bppSSE4::Draw(cons
 							src_mv += 2;
 						}
 
-						if (effective_width & 1) {
+						if ((bt_last == BT_NONE && effective_width & 1) || bt_last == BT_ODD) {
 							/* In case the m-channel is zero, do not remap this pixel in any way. */
 							__m128i srcABCD;
 							if (src_mv->m) {
@@ -197,7 +197,7 @@ bmcr_alpha_blend_single:
 					src += 2;
 					dst += 2;
 				}
-				if (bp->width & 1) {
+				if ((bt_last == BT_NONE && bp->width & 1) || bt_last == BT_ODD) {
 					__m128i srcABCD = _mm_cvtsi32_si128(src->data);
 					__m128i dstABCD = _mm_cvtsi32_si128(dst->data);
 					DARKEN_2();