diff --git a/appveyor.yml b/appveyor.yml
index ac1db2b7e3..e386304028 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -38,7 +38,7 @@ install:
   - conda update -q --all
   - conda install geotiff laszip nitro curl gdal pcl cmake eigen ninja libgdal geos zstd numpy xz libxml2 laz-perf qhull sqlite hdf5 oracle-instantclient
   - call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" amd64
-  - call "%CONDA_ROOT%\\Scripts\\activate.bat base"
+  - call "%CONDA_ROOT%\Scripts\activate.bat base"
   - call scripts\\appveyor\\config.cmd