1 files changed, 1 insertions, 0 deletions
diff --git a/integer.rb b/integer.rb
index b1e288d086..cc2e58948f 100644
--- a/integer.rb
+++ b/integer.rb
@@ -4,6 +4,7 @@ class Integer
   #
   # Returns +true+ if +num+ has a zero value.
   def zero?
+    Primitive.attr! 'inline'
     Primitive.cexpr! 'int_zero_p(self)'
   end
 end