diff --git a/CMakeLists.txt b/CMakeLists.txt
index 95bd537a..245acc8f 100644
--- a/CMakeLists.txt	
+++ b/CMakeLists.txt
@@ -131,6 +131,7 @@ endif ()
 
 include (CheckCCompilerFlag)
 
+#All those checks fail due to linkage errors so we directly set HAVE_<ARCH> in the PORTFILE! We assume the user knows what (s)he is doing!
 if (ENABLE_SSE)
   foreach (FLAG "-msse" "/arch:SSE")
     unset (HAVE_SSE CACHE)
@@ -176,8 +177,9 @@ if (ENABLE_AVX2)
 endif ()
 
 # AVX2 codelets require FMA support as well
+# AVX2 implicitly includes FMA using Visual Studio (also definition __FMA__ is not set)
 if (ENABLE_AVX2)
-  foreach (FLAG "-mfma" "/arch:FMA")
+  foreach (FLAG "-mfma" "/arch:AVX2")
     unset (HAVE_FMA CACHE)
     check_c_compiler_flag (${FLAG} HAVE_FMA)
     if (HAVE_FMA)