diff --git a/th02/main/playfld.hpp b/th02/main/playfld.hpp
index 9d903448..290139f1 100644
--- a/th02/main/playfld.hpp
+++ b/th02/main/playfld.hpp
@@ -181,34 +181,4 @@
 	PLAYFIELD_TOP + TO_PIXEL(subpixel_center_y) - (sprite_h / 2) \
 )
 
-#ifdef SUBPIXEL_HPP
-	struct PlayfieldPoint : public SPPoint {
-		screen_x_t to_screen_left(pixel_t sprite_w_if_centered = 0) const {
-			return playfield_to_screen_left(x, sprite_w_if_centered);
-		}
-
-		screen_y_t to_screen_top(pixel_t sprite_h_if_centered = 0) const {
-			return playfield_to_screen_top(y, sprite_h_if_centered);
-		}
-
-		#ifdef SCROLL_HPP
-			vram_y_t to_vram_top_scrolled_seg1(
-				pixel_t sprite_h_if_centered
-			) const {
-				return scroll_subpixel_y_to_vram_seg1(
-					y + (PLAYFIELD_TOP - (sprite_h_if_centered / 2))
-				);
-			}
-
-			vram_y_t to_vram_top_scrolled_seg3(
-				pixel_t sprite_h_if_centered
-			) const {
-				return scroll_subpixel_y_to_vram_seg3(
-					y + (PLAYFIELD_TOP - (sprite_h_if_centered / 2))
-				);
-			}
-		#endif
-	};
-#endif
-
 #include "th01/main/playfld.hpp"
diff --git a/th04/main/playfld.hpp b/th04/main/playfld.hpp
index 17b3e86a..68f0a0a2 100644
--- a/th04/main/playfld.hpp
+++ b/th04/main/playfld.hpp
@@ -1,5 +1,35 @@
 #include "th02/main/playfld.hpp"
 
+#ifdef SUBPIXEL_HPP
+	struct PlayfieldPoint : public SPPoint {
+		screen_x_t to_screen_left(pixel_t sprite_w_if_centered = 0) const {
+			return playfield_to_screen_left(x, sprite_w_if_centered);
+		}
+
+		screen_y_t to_screen_top(pixel_t sprite_h_if_centered = 0) const {
+			return playfield_to_screen_top(y, sprite_h_if_centered);
+		}
+
+		#ifdef SCROLL_HPP
+			vram_y_t to_vram_top_scrolled_seg1(
+				pixel_t sprite_h_if_centered
+			) const {
+				return scroll_subpixel_y_to_vram_seg1(
+					y + (PLAYFIELD_TOP - (sprite_h_if_centered / 2))
+				);
+			}
+
+			vram_y_t to_vram_top_scrolled_seg3(
+				pixel_t sprite_h_if_centered
+			) const {
+				return scroll_subpixel_y_to_vram_seg3(
+					y + (PLAYFIELD_TOP - (sprite_h_if_centered / 2))
+				);
+			}
+		#endif
+	};
+#endif
+
 #if defined(SUBPIXEL_HPP) && defined(MOTION_HPP)
 	struct PlayfieldMotion : public MotionBase<PlayfieldPoint> {
 		// Moves by one step, and returns the new current position.