diff --git a/.appveyor.yml b/.appveyor.yml
index 62edb100..84fe1813 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -7,5 +7,6 @@ platform:
   - Win32
   - x64
 build_script:
+  - git submodule update --init --recursive
   - scripts\build_all.bat
 test: off
diff --git a/.travis.yml b/.travis.yml
index 06f1f5b6..e024432a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -73,4 +73,5 @@ matrix:
 before_install:
   - eval "${MATRIX_EVAL}"
 script:
+  - git submodule update --init --recursive
   - ./scripts/build_all.sh