diff --git a/mkessler-operators.sty b/mkessler-operators.sty
index 0424146..dea3e5f 100644
--- a/mkessler-operators.sty
+++ b/mkessler-operators.sty
@@ -139,3 +139,4 @@
 \DeclareMathOperator{\infl}{inf}
 \DeclareMathOperator{\cov}{cov}
 \DeclareMathOperator{\cor}{cor}
+\DeclareMathOperator{\ord}{ord}