diff --git a/src/term-reader.cr b/src/term-reader.cr
index 456af0a..353a3ea 100644
--- a/src/term-reader.cr
+++ b/src/term-reader.cr
@@ -99,7 +99,7 @@ module Term
       yield
     ensure
       begin
-        @output.as(IO::FileDescriptor).sync = !!buffering
+        @output.as(IO::FileDescriptor).sync = buffering || false
       rescue
       end
     end