diff --git a/src/drawing/sprite.c b/src/drawing/sprite.c
index 2b5dc9db98..1907383f0e 100644
--- a/src/drawing/sprite.c
+++ b/src/drawing/sprite.c
@@ -216,6 +216,7 @@ static void FASTCALL gfx_bmp_sprite_to_buffer(uint8* palette_pointer, uint8* unk
 
 		//Mix with another image?? and colour adjusted
 		if (unknown_pointer!= NULL){ //Not tested. I can't actually work out when this code runs.
+			openrct2_assert(false, "Dead code reached. Please contact a dev. Unknown pointer used.");
 			unknown_pointer += source_pointer - source_image->offset;// RCT2_GLOBAL(0x9E3CE0, uint32);
 
 			for (; height > 0; height -= zoom_amount){
@@ -296,6 +297,7 @@ static void FASTCALL gfx_bmp_sprite_to_buffer(uint8* palette_pointer, uint8* unk
 	}
 
 	if (unk_9E3CDC != NULL) { //Not tested. I can't actually work out when this code runs.
+		openrct2_assert(false, "Dead code reached. Please contact a dev. Unknown pointer used.");
 		unknown_pointer += source_pointer - source_image->offset;
 
 		for (; height > 0; height -= zoom_amount){
@@ -573,6 +575,7 @@ void FASTCALL gfx_draw_sprite_palette_set_software(rct_drawpixelinfo *dpi, int i
 		gfx_bmp_sprite_to_buffer(palette_pointer, unknown_pointer, source_pointer, dest_pointer, g1_source, dpi, height, width, image_type);
 		return;
 	}
+	openrct2_assert(false, "Dead code reached. Please contact a dev. Non RLE or BMP.");
 	//0x67A60A Not tested
 	int total_no_pixels = g1_source->width*g1_source->height;
 	source_pointer = g1_source->offset;