diff -rupw  gcc/config/avr/avr.md  gcc/config/avr/avr.md
---  gcc/config/avr/avr.md	2011-02-23 15:54:14.000000000 -0600
+++  gcc/config/avr/avr.md	2011-02-23 15:55:22.000000000 -0600
@@ -1082,8 +1082,8 @@
    (set_attr "cc" "clobber")])
 
 (define_expand "<any_extend:u>mulhisi3"
-  [(set (reg:HI 18) (match_operand:SI 1 "register_operand" ""))
-   (set (reg:HI 20) (match_operand:SI 2 "register_operand" ""))
+  [(set (reg:HI 18) (match_operand:HI 1 "register_operand" ""))
+   (set (reg:HI 20) (match_operand:HI 2 "register_operand" ""))
    (set (reg:SI 22)
 	(mult:SI (any_extend:SI (reg:HI 18))
 		 (any_extend:SI (reg:HI 20))))