diff --git a/Makefile.am b/Makefile.am
index eddf69389..7152b011e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -242,7 +242,7 @@ signed-bundle: $(MACAPPNAME)
 	cd $(BUNDLEDIR)/.. && rm -f $(MAXAPPDMG) && hdiutil create $(MACAPPDMG) -srcfolder $(MACAPPNAME) -ov && cd -
 
 pkg: $(MACAPPNAME)
-	pkgbuild --install-location /Applications --component $(MACAPPNAME) $(MACAPPPKG)
+	pkgbuild --install-location /Applications --scripts ${srcdir}/build/macos/pkg-scripts --component $(MACAPPNAME) $(MACAPPPKG)
 	
 
 ###
diff --git a/build/macos/Makefile.am b/build/macos/Makefile.am
index e90eb2ffe..9521c0553 100644
--- a/build/macos/Makefile.am
+++ b/build/macos/Makefile.am
@@ -1,3 +1,3 @@
-EXTRA_DIST=linphone.bundle environment.sh Info-linphone.plist.in
+EXTRA_DIST=linphone.bundle environment.sh Info-linphone.plist.in pkg-scripts/*
 
 
diff --git a/build/macos/pkg-scripts/postinstall b/build/macos/pkg-scripts/postinstall
new file mode 100755
index 000000000..b7ca52a50
--- /dev/null
+++ b/build/macos/pkg-scripts/postinstall
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+CURL=/usr/bin/curl
+BUNZIP2=/usr/bin/bunzip2
+VERSION=1.4.0
+BASENAME=libopenh264-${VERSION}-osx64
+FILENAME=${BASENAME}.dylib.bz2
+TMPDIR=/tmp/linphone_installer
+
+mkdir ${TMPDIR}
+cd ${TMPDIR}
+${CURL} http://ciscobinary.openh264.org/${FILENAME} > ${FILENAME}
+${BUNZIP2} ${FILENAME}
+cp ${BASENAME}.dylib /Applications/Linphone.app/Contents/Resources/lib/libopenh264.0.dylib
+rm -r ${TMPDIR}
+