diff --git a/SlidingSurface3D/rfpm_common.pro b/SlidingSurface3D/rfpm_common.pro
index 80a155ba73087345d229462168e43c2080d7078e..ac40b3931c3dca1696b980ab1c18d0ecf3017339 100644
--- a/SlidingSurface3D/rfpm_common.pro
+++ b/SlidingSurface3D/rfpm_common.pro
@@ -8,7 +8,7 @@ If(lc <= 0)
 EndIf
 
 // Number of elements on the sliding surface in rotation direction
-NbrDiv = 100*mm/lc;
+NbrDiv = Floor[100*mm/lc];
 
 ModelAngleMin = 0. ;
 ModelAngleMax = 60. ;