diff --git a/.appveyor.yml b/.appveyor.yml
index 85bf59b..59cb0e4 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -5,8 +5,8 @@ environment:
       generator: "MinGW Makefiles"
       compiler: mingw
       TOOLCHAIN_PATH: C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1/mingw32\bin
-      CMAKE_C_COMPILER: C:/mingw-w64/i686-6.3.0-posix-dwarf-rt_v5-rev1/mingw32/bin/gcc.exe
-      CMAKE_CXX_COMPILER: C:/mingw-w64/i686-6.3.0-posix-dwarf-rt_v5-rev1/mingw32/bin/g++.exe
+      CC: C:/mingw-w64/i686-6.3.0-posix-dwarf-rt_v5-rev1/mingw32/bin/gcc.exe
+      CXX: C:/mingw-w64/i686-6.3.0-posix-dwarf-rt_v5-rev1/mingw32/bin/g++.exe
       configuration: Release
 
     - platform: x64
@@ -14,8 +14,8 @@ environment:
       generator: "MinGW Makefiles"
       compiler: mingw
       TOOLCHAIN_PATH: C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin
-      CMAKE_C_COMPILER: C:/mingw-w64/x86_64-7.2.0-posix-seh-rt_v5-rev1/mingw64/bin/gcc.exe
-      CMAKE_CXX_COMPILER: C:/mingw-w64/x86_64-7.2.0-posix-seh-rt_v5-rev1/mingw64/bin/g++.exe
+      CC: C:/mingw-w64/x86_64-7.2.0-posix-seh-rt_v5-rev1/mingw64/bin/gcc.exe
+      CXX: C:/mingw-w64/x86_64-7.2.0-posix-seh-rt_v5-rev1/mingw64/bin/g++.exe
       configuration: Release
 
 matrix:
@@ -34,7 +34,7 @@ build_script:
   - cd build
   - if [%compiler%]==[msvc] cmake -G"%generator%" ..
   - if [%compiler%]==[mingw] set PATH=%TOOLCHAIN_PATH%\bin;%PATH%
-  - if [%compiler%]==[mingw] cmake -G"%generator%" -DCMAKE_SH=CMAKE_SH-NOTFOUND -DCMAKE_BUILD_TYPE=%configuration% ..
+  - if [%compiler%]==[mingw] cmake -G"%generator%" -DCMAKE_C_COMPILER=%CC% -DCMAKE_CXX_COMPILER=%CXX% -DCMAKE_SH=CMAKE_SH-NOTFOUND -DCMAKE_BUILD_TYPE=%configuration% ..
   - cmake --build . --config %configuration%
   
 test_script: