diff --git a/ci-build.cmake b/ci-build.cmake
index 437a7c18fd0..e878f8b6514 100644
--- a/ci-build.cmake
+++ b/ci-build.cmake
@@ -37,8 +37,8 @@ elseif("$ENV{TRAVIS_OS_NAME}" STREQUAL "osx")
 endif()
 
 if(DEFINED ENV{APPVEYOR})
-    set(CMAKE_BUILD_TYPE Release)
     if("$ENV{APPVEYOR_BUILD_WORKER_IMAGE}" STREQUAL "Visual Studio 2017")
+        set(CMAKE_BUILD_TYPE Release)
         set(GENERATOR -G "Visual Studio 15")
     else()
         set(GENERATOR -G "Visual Studio 12")