diff --git a/dcompiler.dd b/dcompiler.dd
index 14d898bc6d..d88a597635 100644
--- a/dcompiler.dd
+++ b/dcompiler.dd
@@ -649,6 +649,13 @@ dmd -cov -unittest myprog.d
         generate a $(TT .map) file
       )
 
+      $(SWITCH $(SWNAME -mavx),
+        generate $(LINK2 https://en.wikipedia.org/wiki/Advanced_Vector_Extensions, AVX)
+        instructions instead of $(LINK2 https://en.wikipedia.org/wiki/Streaming_SIMD_Extensions, SSE)
+        instructions for vector and floating point operations.
+        Not available for 32 bit memory models other than OSX32.
+      )
+
     $(WINDOWS
       $(SWITCH $(SWNAME -mscrt)=$(I libname),
         if building MS-COFF object files with -m64 or -m32mscoff, embed a reference to