diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp
--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -322,9 +322,9 @@ void Ship::UpdateDeltaXY(Direction direc
 	uint32 x = _delta_xy_table[direction];
 	this->x_offs        = GB(x,  0, 8);
 	this->y_offs        = GB(x,  8, 8);
-	this->sprite_width  = GB(x, 16, 8);
-	this->sprite_height = GB(x, 24, 8);
-	this->z_height      = 6;
+	this->x_extent      = GB(x, 16, 8);
+	this->y_extent      = GB(x, 24, 8);
+	this->z_extent      = 6;
 }
 
 void RecalcShipStuff(Vehicle *v)