diff --git a/.appveyor.yml b/.appveyor.yml
index ee0f19d5..152b2a86 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -42,7 +42,7 @@ before_build:
 
 build_script:
   - |
-    C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\CL.exe cpucount.cpp && .\cpucount.exe
+    "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\CL.exe" cpucount.cpp && .\cpucount.exe
   - md build && cd build
   - cmake -G "%CMAKE_GENERATOR%" %CMAKE_FLAGS% ..
   - if %compiler%==mingw ( mingw32-make tester examples )