diff --git a/appveyor.yml b/appveyor.yml
index 9abea79..7b209be 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,7 +9,7 @@ environment:
   # Tell msys2 to inherit the current directory when starting the shell
   CHERE_INVOKING: 1
   matrix:
-    # - BUILD_TYPE: mingw
+    - BUILD_TYPE: mingw
     - BUILD_TYPE: msvc
 
 platform:
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5abd8b3..9659e57 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -106,9 +106,9 @@ else()
         endif()
     endif()
 
-    if (NOT DEBUG)
-        add_compile_options("-flto")
-    endif()
+    # if (NOT DEBUG)
+    #    add_compile_options("-flto")
+    # endif()
 endif()
 
 add_subdirectory(common)