diff --git a/appveyor.yml b/appveyor.yml
index 9af9ea5e..ea96cfbe 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -35,5 +35,7 @@ build_script:
       ninja
       cd..
       nmake -f makefile.msvc all
+      nmake -f makefile.msvc clean
+      nmake -f makefile.msvc all CFLAGS="/Ox /DUSE_LTM /DLTM_DESC /DLTC_AES_NI /I../libtommath"
 test_script:
 - cmd: test.exe