diff --git a/graph.cpp b/graph.cpp
index 9c566854..fe6ec036 100644
--- a/graph.cpp
+++ b/graph.cpp
@@ -836,7 +836,7 @@ EX bool drawItemType(eItem it, cell *c, const shiftmatrix& V, color_t icol, int
     
 #if CAP_SHAPES
   auto sinptick = [c, pticks] (int period) { return c ? sintick(period) : sin(animation_factor * vid.ispeed * pticks / period);};
-  auto spinptick = [c, pticks] (int period, ld phase) { return c ? spintick(period, phase) : spin((animation_factor * vid.ispeed * pticks + phase) / period); };
+  auto spinptick = [c, pticks] (int period, ld phase) { return c ? spintick(period, phase) : spin((animation_factor * vid.ispeed * pticks) / period + phase * 2 * M_PI); };
   int ct6 = c ? ctof(c) : 1;
   hpcshape *xsh = 
     (it == itPirate || it == itKraken) ? &cgi.shPirateX :