1 files changed, 1 insertions, 1 deletions
diff --git a/numeric.rb b/numeric.rb
index f026679210..0a1f14865f 100644
--- a/numeric.rb
+++ b/numeric.rb
@@ -278,7 +278,7 @@ class Integer
   #
   #    3.ceildiv(1.2) # => 3
   def ceildiv(other)
-    -div(-other)
+    -div(0 - other)
   end
 
   #