diff --git a/.appveyor.yml b/.appveyor.yml
index fa690758..16b55242 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -2,8 +2,8 @@ version: 7.20.{build}
 configuration: Release
 platform: Any CPU
 environment:
-  NSISDIR: C:\Program Files (x86)\NSIS
-  MSVCDIR: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build
+  NSISDIR: "C:\Program Files (x86)\NSIS"
+  MSVCDIR: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build"
   matrix:
   - QTDIR: C:\Qt\5.14\msvc2017
     VCVARS: vcvars32.bat
@@ -21,7 +21,7 @@ install:
 - cmd: >-
     set PATH=%QTDIR%\bin;%NSISDIR%;%PATH%
 
-    call "%MSVCDIR%\%VCVARS%"
+    call %MSVCDIR%\%VCVARS%
 
 build_script:
 - cmd: >-