diff --git a/build_inplace b/build_inplace
index 54809dd9..2456f657 100755
--- a/build_inplace
+++ b/build_inplace
@@ -1,7 +1,9 @@
 #!/bin/sh
 
+chmod +x extract_pjsip.sh
+./extract_pjsip.sh
+
 chmod +x deps/pjsip/configure
 chmod +x deps/pjsip/aconfigure
 python3 setup.py build_ext --inplace "$@"
 test -d build && python3 setup.py clean
-
diff --git a/docs/Install.linux b/docs/Install.linux
index adc49cab..fe68fbef 100644
--- a/docs/Install.linux
+++ b/docs/Install.linux
@@ -1,97 +1,101 @@
 
 SIP SIMPLE SDK installation on Linux
 ------------------------------------
 
 Home page: http://sipsimpleclient.org
 
 
 This document described the installation procedure on 
 Linux operating systems.
 
 
 Step 1. Prerequisites
 ---------------------
 
 Install the C compiling environment, Python 3 and the development version
 for the following packages:
 
  * openssl
  * ffmpeg
 
 
 Step 2. Install system dependencies
 -----------------------------------
 
 See Dependencies.txt for detailed description of the required libraries and
 their minimum version number.
 
 Use the appropriate package manager for your Linux distribution to install
 the following packages, notice the minimum version numbers.
 
 You can use the easy_install script provided by the python-setuptools
 package to install the packages:
 
 sudo pip3 install -U cython dnspython lxml twisted python-dateutil \
 greenlet zope.interface requests
 
 
 Step 3. Install AG Projects dependencies
 ----------------------------------------
 
  - python3-application
  - python3-eventlib
  - python3-gnutls
  - python3-otr
  - python3-msrplib
  - python3-xcaplib
 
 
 For each of them, in the exact order as listed above, retrieve the packages
 as follows:
 
 Using darcs:
 
 darcs clone http://devel.ag-projects.com/repositories/PROJECT
 
 replace PROJECT with each of the names above
 
 As tar archives from:
 
 http://download.ag-projects.com/SipSimpleSDK/Python3/
 
 Install these packages by going into each directory.
 
 Using pip3 inside your user environment:
 
 pip3 install --user .
 
 System-wide using setup.py:
 
 sudo python3 setup.py install
 
 As a debian package:
 
 ./makedeb.sh
 
 The debian package can be found inside ./dist folder
 
 sudo dpkg -i *.deb
 
 
 Step 4. Install the SDK
 -----------------------
 
+First unpack pjsip archive (only needs to be done once):
+
+./extract_pjsip.sh
+
 The SDK consists of two packages:
 
  - python3-sipsimple
  - sipclients3 (optional, for testing all SDK functions)
 
 Install them similar to the dependencies above.
 
 
 Step 5. Testing the SDK
 -----------------------
 
 Use the command line tools provided by sipclients3 package, the executables
 start with sip- prefix
 
diff --git a/extract_pjsip.sh b/extract_pjsip.sh
new file mode 100755
index 00000000..3b0ceebf
--- /dev/null
+++ b/extract_pjsip.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+if [ ! -d deps/pjsip ]; then
+    tar zxvf deps/pjsip-2.10.tgz -C deps/
+fi