diff --git a/.appveyor.yml b/.appveyor.yml
index c78356a..cd7812b 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -44,7 +44,7 @@ test_script:
 
 # hard code fsreg parameters because appveyor does not like percents ("--VolumePrefix=%1 %2")
 - C:\projects\winfsp\tools\fsreg.bat gomemfs "C:\projects\go\src\github.com\winfsp\cgofuse\memfs.exe" "--VolumePrefix=\gomemfs\share M:" "D:P(A;;RPWPLC;;;WD)"
-- C:\projects\winfsp\tools\fsreg.bat gomemfs3 "C:\projects\go\src\github.com\winfsp\cgofuse\memfs3.exe" "--VolumePrefix=\gomemfs\share M:" "D:P(A;;RPWPLC;;;WD)"
+- C:\projects\winfsp\tools\fsreg.bat gomemfs3 "C:\projects\go\src\github.com\winfsp\cgofuse\memfs3.exe" "--VolumePrefix=\gomemfs3\share M:" "D:P(A;;RPWPLC;;;WD)"
 
 # test against WinFsp v1.0
 - 'net use M: \\gomemfs\share'