diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt
index 0bf8c4f8b4d3..96783a58cf96 100644
--- a/llvm/lib/Target/X86/README.txt
+++ b/llvm/lib/Target/X86/README.txt
@@ -1039,3 +1039,7 @@ int decode_byte (const decode_t* decode) {
     return f(decode);
   return 0;
 }
+
+//===---------------------------------------------------------------------===//
+
+Add support for 3DNow!