diff --git a/.appveyor.yml b/.appveyor.yml
index 921c9f7a8..8c9d15bc1 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -14,6 +14,7 @@ platform:
   - x64
 
 install:
+  - git submodule update --init --recursive
   - setlocal EnableExtensions EnableDelayedExpansion
 
   - IF "%PLATFORM%" == "x86" (