diff --git a/blueprint/src/preamble/common.tex b/blueprint/src/preamble/common.tex
index c711f0eb..533cc859 100644
--- a/blueprint/src/preamble/common.tex
+++ b/blueprint/src/preamble/common.tex
@@ -21,7 +21,7 @@
 
 
 \theoremstyle{plain}
-\newtheorem{theorem}{Theorem}
+\newtheorem{theorem}{Theorem}[section]
 \newtheorem{lemma}[theorem]{Lemma}
 \newtheorem{proposition}[theorem]{Proposition}
 \newtheorem{cor}[theorem]{Corollary}
@@ -33,7 +33,6 @@
 \numberwithin{section}{chapter}
 \numberwithin{subsection}{section}
 \numberwithin{subsubsection}{subsection}
-\numberwithin{theorem}{section}
 \numberwithin{equation}{section}
 
 \newcommand{\R}{{\mathbb{R}}}