diff --git a/lily/stem.cc b/lily/stem.cc
index 37aa40c250..34bf557fca 100644
--- a/lily/stem.cc
+++ b/lily/stem.cc
@@ -626,7 +626,7 @@ Stem::calc_positioning_done (SCM smob)
       else
         parity = true;
 
-      lastpos = int (p);
+      lastpos = int (round (p));
     }
 
   return SCM_BOOL_T;