diff --git a/admin_manual/installation/source_installation.rst b/admin_manual/installation/source_installation.rst
index 245e390f5..d33f15392 100644
--- a/admin_manual/installation/source_installation.rst
+++ b/admin_manual/installation/source_installation.rst
@@ -652,7 +652,7 @@ confirm your paths, for example::
 If any of your system environment variables are not present in the file then
 you must add them.
 
-Alternatively it is possible to use the environemt variables of your system by modifying::
+Alternatively it is possible to use the environment variables of your system by modifying::
 
     /etc/php/7.2/fpm/pool.d/www.conf