diff --git a/general-info/release-19f.txt b/general-info/release-19f.txt
index 03bbd973fc4a32e694fca60e9eadb78a4bb4fcb6..25a1e668253d8e16b01d6dc37e9eb4c0b50703d9 100644
--- a/general-info/release-19f.txt
+++ b/general-info/release-19f.txt
@@ -34,12 +34,16 @@ New in this release:
       o CMUCL automatically detects whether sse2 is supported or not
         and loads up the appropriate core file.
       o New -fpu switch allows the user to specify explicitly which
-        core should be used.
+        core should be used.  The valid values are x87, sse2, or auto
+        (the default).
       o Fasls compiled with sse2 support have the extension sse2f.
         Otherwise, the normal x86f extension is used.  This allows the
         user to do tests/experiments with both x87 and sse2 without
         having to mess around with different directories and removing
         fasls before building for a different FPU.
+      o If the chip supports sse2, but CMUCL can't find the sse2 core,
+        CMUCL will try to fall back to the x87 core.  (This only
+        happens if -fpu is auto.)
 
   * ANSI compliance fixes:
     - Fix bug in backquote printer.  If the variable is @foo, we want