diff --git a/appveyor.yml b/appveyor.yml
index 6b4411c..c8251ad 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,8 +7,8 @@ install:
   - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
   - set PATH=%PATH%;%LOCALAPPDATA%;C:\msys64\mingw64\bin
   - set GOPATH=C:\projects\go-avif
-  - set CGO_CFLAGS="-I%LOCALAPPDATA:\=/%\aom"
-  - set CGO_LDFLAGS="-static -L%LOCALAPPDATA:\=/%\aom_build\%CONFIGURATION%"
+  - set CGO_CFLAGS="-I%LOCALAPPDATA:\=/%/aom"
+  - set CGO_LDFLAGS="-static -L%LOCALAPPDATA:\=/%\aom_build/%CONFIGURATION%"
   # Tools
   - cd %LOCALAPPDATA%
   - appveyor DownloadFile http://www.tortall.net/projects/yasm/releases/yasm-1.3.0-win64.exe -FileName yasm.exe