diff --git a/blueprint/src/preamble/common.tex b/blueprint/src/preamble/common.tex
index 6ce884c4..eb44a11b 100644
--- a/blueprint/src/preamble/common.tex
+++ b/blueprint/src/preamble/common.tex
@@ -4,6 +4,7 @@
 
 % Letters
 \newcommand{\C}{\mathbb{C}}
+\newcommand{\Z}{\mathbb{Z}}
 \newcommand{\bbc}{\mathbb{C}}
 \newcommand{\E}{\mathbb{E}}
 \newcommand*{\bbe}{\mathbb{E}}