diff --git a/report.tex b/report.tex
index 02a2b00e..6e6d2b0a 100644
--- a/report.tex
+++ b/report.tex
@@ -24,6 +24,8 @@ headsepline,
 
 % document language and hyphenation
 \usepackage[english]{babel}
+% math stuff
+\usepackage{amsmath}
 
 % UTF-8 encoding
 \usepackage[utf8]{inputenc}
diff --git a/shell.nix b/shell.nix
index 8fbe5e32..d4ee20fa 100644
--- a/shell.nix
+++ b/shell.nix
@@ -10,6 +10,7 @@ let
     scheme-small
 
     acro
+    amsmath
     anyfontsize
     biblatex
     csquotes