diff --git a/appveyor.yml b/appveyor.yml
index 0a23a659..42d4aa3a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,6 +12,8 @@ install:
   - ninja --version
 
 before_build:
+    - git submodule init
+    - git submodule update
     - mkdir build
     - cd build
     - mkdir temp