diff --git a/hdathesis.sty b/hdathesis.sty
index f839168..5f3e1a2 100644
--- a/hdathesis.sty
+++ b/hdathesis.sty
@@ -54,7 +54,7 @@
  \newtheorem{Lemma}{Lemma}
  \newtheorem{Corollary}{Corollary}
 }
-\theoremstyle{plain} {{\theorembodyfont{\normalfont}
+\theoremstyle{plain} {\theorembodyfont{\normalfont}
 \newtheorem{Definition}{Definition}}
 \newcommand{\qed}{\hfill \mbox{\raggedright \rule{.07in}{.1in}}}
 \newenvironment{proof}{\vspace{1ex}\noindent{\textbf Proof}\hspace{0.5em}}