diff --git a/clean_build.bat b/clean_build.bat
index 8f9fa8b9..4416a7e9 100644
--- a/clean_build.bat
+++ b/clean_build.bat
@@ -33,6 +33,8 @@ set B_QT_FULLPATH=%B_QT_ROOT%\%B_QT_VER%\%B_QT_MSVC%
 echo Bonjour: %BONJOUR_SDK_HOME%
 echo Qt: %B_QT_FULLPATH%
 
+git submodule update --init --recursive
+
 rmdir /q /s build
 mkdir build
 if ERRORLEVEL 1 goto failed
diff --git a/clean_build.sh b/clean_build.sh
index fc1065a5..3a92d8b9 100755
--- a/clean_build.sh
+++ b/clean_build.sh
@@ -18,6 +18,10 @@ if [ "$(uname)" = "Darwin" ]; then
 fi
 # allow local customizations to build environment
 [ -r ./build_env.sh ] && . ./build_env.sh
+
+# Initialise Git submodules
+git submodule update --init --recursive
+
 B_CMAKE_FLAGS="-DCMAKE_BUILD_TYPE=$B_BUILD_TYPE $B_CMAKE_FLAGS"
 rm -rf build
 mkdir build || exit 1