diff --git a/INSTALL.asciidoc b/INSTALL.asciidoc
index 0299b80d3..3aeb09cad 100644
--- a/INSTALL.asciidoc
+++ b/INSTALL.asciidoc
@@ -32,7 +32,7 @@ Then install the packages like this:
 
 ----
 # apt-get update
-# apt-get install -t experimental python3-pyqt5 python3-pyqt5.qtwebkit python3-sip
+# apt-get install -t experimental python3-pyqt5 python3-pyqt5.qtwebkit python3-sip python3-dev
 # apt-get install python-tox
 ----
 
@@ -50,7 +50,7 @@ For distributions other than Debian or if you prefer to not use the
 experimental repo:
 
 ----
-# apt-get install python3-pyqt5 python3-pyqt5.qtwebkit python-tox python3-sip
+# apt-get install python3-pyqt5 python3-pyqt5.qtwebkit python-tox python3-sip python3-dev
 ----
 
 To generate the documentation for the `:help` command, when using the git