diff --git a/src/addresses.h b/src/addresses.h
index 02e5dbdb84..024430432b 100644
--- a/src/addresses.h
+++ b/src/addresses.h
@@ -192,11 +192,22 @@
 
 #define RCT2_ADDRESS_PALETTE_EFFECT_FRAME_NO		0x009DE584
 
+// Flags:
+// 0x1 Enable selection
+// 0x2 Enable construct selection, see CONSTRUCT_PATH_*
+// 0x4 Show yellow arrow, see MAP_ARROW_*
+// 0x8 ?
 #define RCT2_ADDRESS_MAP_SELECTION_FLAGS			0x009DE58A
 #define RCT2_ADDRESS_MAP_SELECTION_A_X				0x009DE58C
 #define RCT2_ADDRESS_MAP_SELECTION_B_X				0x009DE58E
 #define RCT2_ADDRESS_MAP_SELECTION_A_Y				0x009DE590
 #define RCT2_ADDRESS_MAP_SELECTION_B_Y				0x009DE592
+// Types:
+// 0-3   Corners
+// 4     Whole tile
+// 5     ?
+// 6-9   Quarters
+// 10-13 Edges
 #define RCT2_ADDRESS_MAP_SELECTION_TYPE				0x009DE594
 
 #define RCT2_ADDRESS_MAP_ARROW_X					0x009DEA48
diff --git a/src/windows/footpath.c b/src/windows/footpath.c
index 0dc81edbc0..cb7cd79e01 100644
--- a/src/windows/footpath.c
+++ b/src/windows/footpath.c
@@ -714,13 +714,13 @@ static void window_footpath_set_selection_start_bridge_at_point(int screenX, int
 	rct_map_element *mapElement;
 
 	map_invalidate_selection_rect();
-	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) &= 0xfffa;
+	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) &= ~(1 << 0) & (1 << 2);
 
 	sub_68A0C9(screenX, screenY, &x, &y, &direction, &mapElement);
 	if (x == 0x8000)
 		return;
 
-	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) |= 5;
+	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) |= (1 << 0) | (1 << 2);
 	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_TYPE, uint16) = 4;
 	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_A_X, uint16) = x;
 	RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_B_X, uint16) = x;