diff --git a/Components/9918/9918.cpp b/Components/9918/9918.cpp
index 554d39416..e4ae897a5 100644
--- a/Components/9918/9918.cpp
+++ b/Components/9918/9918.cpp
@@ -124,7 +124,7 @@ void Base::posit_sprite(LineBuffer &buffer, int sprite_number, int sprite_positi
 		return;
 	}
 
-	const int sprite_row = ((screen_row + 1) % mode_timing_.total_lines) - ((sprite_position + 1) & 255);
+	const int sprite_row = (((screen_row + 1) % mode_timing_.total_lines) - ((sprite_position + 1) & 255)) & 255;
 	if(sprite_row < 0 || sprite_row >= sprite_height_) return;
 
 	if(buffer.active_sprite_slot == mode_timing_.maximum_visible_sprites) {