diff --git a/appveyor.yml b/appveyor.yml
index d7303c08..a0f69a51 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,2 +1,2 @@
 before_build: cmake .
-build_script: C:\Program Files\MSBuild\12.0\bin\msbuild.exe
+build_script: "C:\Program Files\MSBuild\12.0\bin\msbuild.exe"