diff --git a/.travis.yml b/.travis.yml
index 796448d..e17a432 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -210,6 +210,7 @@ install:
   - git submodule init tools/build
   - git submodule init tools/boost_install
   - git submodule init libs/headers
+  - git submodule init libs/config
   - git submodule update --jobs 4
   - cp -r $TRAVIS_BUILD_DIR/* libs/integer
   - python tools/boostdep/depinst/depinst.py integer
diff --git a/appveyor.yml b/appveyor.yml
index 2cbcb35..2cfaa3e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -48,6 +48,7 @@ install:
   - git submodule init tools/build
   - git submodule init tools/boost_install
   - git submodule init libs/headers
+  - git submodule init libs/config
   - git submodule update --jobs 4
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\integer
   - python tools/boostdep/depinst/depinst.py integer