diff --git a/INSTALL b/INSTALL
index a6674103019d..0e2edf8e6493 100644
--- a/INSTALL
+++ b/INSTALL
@@ -829,7 +829,7 @@ above commands to select the Qt4 version of the relevant applications.
   libgdal-doc libhdf4g-dev libhdf4g-run python-dev \
   swig libgsl0-dev g++ libjasper-1.701-dev libtiff4-dev subversion gsl-bin \
   libsqlite3-dev sqlite3 ccache make libpq-dev flex bison cmake txt2tags \
-  python-qt4 python-qt4-dev python-sip4 sip4
+  python-qt4 python-qt4-dev python-sip4 sip4 python-sip4-dev
 
 
 /!\ Debian users should use libgdal-dev above rather
diff --git a/INSTALL.t2t b/INSTALL.t2t
index ba090b2e429a..2644c5d8d625 100644
--- a/INSTALL.t2t
+++ b/INSTALL.t2t
@@ -713,7 +713,7 @@ sudo apt-get install gdal-bin libgdal1-dev libgeos-dev proj libtool \
 libgdal-doc libhdf4g-dev libhdf4g-run python-dev \
 swig libgsl0-dev g++ libjasper-1.701-dev libtiff4-dev subversion gsl-bin \
 libsqlite3-dev sqlite3 ccache make libpq-dev flex bison cmake txt2tags \
-python-qt4 python-qt4-dev python-sip4 sip4
+python-qt4 python-qt4-dev python-sip4 sip4 python-sip4-dev
 ```
 
 /!\ Debian users should use libgdal-dev above rather