diff --git a/src/drawing/supports.c b/src/drawing/supports.c
index f2200a3539..6e3570e581 100644
--- a/src/drawing/supports.c
+++ b/src/drawing/supports.c
@@ -288,7 +288,7 @@ bool wooden_a_supports_paint_setup(int supportType, int special, int height, uin
 				hasSupports = true;
 			} else {
 				hasSupports = true;
-				if (!sub_98198C(imageId, 0, 0, lengthX, lengthY, ah, z, rotation)) {
+				if (!sub_98198C(imageId, 0, 0, lengthX, lengthY, ah, z, rotation, byte_97B23C[special].var_0, byte_97B23C[special].var_1, byte_97B23C[special].var_2 + z)) {
 					int edi = RCT2_GLOBAL(0x009DEA58, uint32);
 					RCT2_GLOBAL(edi + 0x20, uint32) = imageColourFlags;
 				}
diff --git a/src/interface/viewport.c b/src/interface/viewport.c
index 0d07c41c79..8fc599186c 100644
--- a/src/interface/viewport.c
+++ b/src/interface/viewport.c
@@ -1089,10 +1089,17 @@ int sub_98197C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, si
  * @param z_offset (ah)
  * @param height (edx)
  * @param rotation
+ * @param word_52 (0x009DEA52)
+ * @param word_54 (0x009DEA54)
+ * @param word_56 (0x009DEA56)
  * @return ??
  */
-int sub_98198C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation)
+int sub_98198C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation, uint16 word_52, uint16 word_54, uint16 word_56)
 {
+	RCT2_GLOBAL(0x009DEA52, uint16) = word_52;
+	RCT2_GLOBAL(0x009DEA54, uint16) = word_54;
+	RCT2_GLOBAL(0x009DEA56, uint16) = word_56;
+
 	RCT2_CALLPROC_X(RCT2_ADDRESS(0x0098198C, uint32)[get_current_rotation()],
 		x_offset | (z_offset << 8),
 		image_id, 
diff --git a/src/interface/viewport.h b/src/interface/viewport.h
index 55086127c3..d2f1e41c4e 100644
--- a/src/interface/viewport.h
+++ b/src/interface/viewport.h
@@ -133,7 +133,7 @@ void sub_688217();
 
 int sub_98196C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation);
 int sub_98197C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation);
-int sub_98198C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation);
+int sub_98198C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation, uint16 word_52, uint16 word_54, uint16 word_56);
 int sub_98199C(int image_id, sint8 x_offset, sint8 y_offset, sint16 length_x, sint16 length_y, sint8 z_offset, int height, uint32 rotation);
 
 void viewport_invalidate(rct_viewport *viewport, int left, int top, int right, int bottom);