diff --git a/tex/latex/dmowitz.sty b/tex/latex/dmowitz.sty
index d1480b4..3013716 100644
--- a/tex/latex/dmowitz.sty
+++ b/tex/latex/dmowitz.sty
@@ -70,5 +70,6 @@
 \newcommand{\anticom}[2]{ \{ #1 , #2 \} }
 \newcommand{\undertilde}[1]{\underset{\sim}{#1}}
 \newcommand{\delfrac}[2]{\frac{\partial #1}{\partial #2}}
+\newcommand{\timeder}[1]{\overset{.}{#1}}
 
 % Environments