diff --git a/COMPILE.txt b/COMPILE.txt
index a37bbf89d..ce9513e80 100644
--- a/COMPILE.txt
+++ b/COMPILE.txt
@@ -24,7 +24,7 @@ Requirements:
 - ...did I forget something?
 
 On Ubuntu/Debian the requirements can be installed by running:
-sudo apt-get install build-essential cmake libgtk2.0-dev libgtkmm-2.4-dev libtiff-dev libpng-dev libjpeg-dev liblcms-dev libiptcdata-dev mercurial
+sudo apt-get install build-essential cmake libgtk2.0-dev libgtkmm-2.4-dev libtiff-dev libpng-dev libjpeg-dev liblcms-dev libiptcdata-dev merciurial
 
 Compile:
 - Enter the root directory of the RawTherapee source tree