diff --git a/appveyor.yml b/appveyor.yml
index 5eed45b4..88c488c8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -16,7 +16,6 @@ environment:
   COVERALLS_REPO_TOKEN:
     secure: QOuiktPDkbsZmX/lOynJrOrrpR09k8C14rSPRjGnohwrgc4Ee97qjoEQpODFb1ZK
   CTEST_OUTPUT_ON_FAILURE: 1
-  _NT_SYMBOL_PATH: srv*C:\symbols*http://msdl.microsoft.com/download/symbols
   matrix:
   - MINGW_DIR: mingw64
     MINGW_URL: https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/4.9.2/threads-win32/seh/x86_64-4.9.2-release-win32-seh-rt_v4-rev4.7z/download