diff --git a/Internal-Encoding-of-x86-Encodings.md b/Internal-Encoding-of-x86-Encodings.md
index 3e1f6ca..401cff1 100644
--- a/Internal-Encoding-of-x86-Encodings.md
+++ b/Internal-Encoding-of-x86-Encodings.md
@@ -37,4 +37,6 @@ If instruction length in bytes turns out to be less helpful than originally expe
 
 * use override if specified;
 * otherwise check for an indirect source and, if one is present, see whether it has a base that implies a default segment;
-* otherwise use DS.
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+* otherwise use DS.
+
+Separately, the currently-allocated 8 bits would not be enough to hold the operation if both floating point and MMX instructions were added, never mind the SSEs.
\ No newline at end of file