diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index 2fa72d6ded0..976325f3bed 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -386,9 +386,10 @@ class mrp_bom_revision(osv.osv):
 mrp_bom_revision()
 
 def rounding(f, r):
+    import math
     if not r:
         return f
-    return round(f / r) * r
+    return math.ceil(f / r) * r
 
 class mrp_production(osv.osv):
     """