diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2f628f3b127..29f3c976406 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Thu Oct 14 10:51:49 1999  Richard Henderson  <rth@cygnus.com>
+
+	* m68k.md (zero_extendsidi2): Add missing output reload constraint.
+
 Wed Oct 13 00:09:18 1999  Gerald Pfeifer  <pfeifer@dbai.tuwien.ac.at>
 
 	* invoke.texi: Label -Wbad-function-cast, -Wmissing-prototypes,
diff --git a/gcc/config/m68k/m68k.md b/gcc/config/m68k/m68k.md
index 37e5ea32c17..8a952590ec5 100644
--- a/gcc/config/m68k/m68k.md
+++ b/gcc/config/m68k/m68k.md
@@ -1521,7 +1521,7 @@
 
 ;; this is the canonical form for (lshiftrt:DI x 32)
 (define_insn "zero_extendsidi2"
-  [(set (match_operand:DI 0 "general_operand" "rm")
+  [(set (match_operand:DI 0 "general_operand" "=rm")
     (zero_extend:DI (match_operand:SI 1 "general_operand" "rm")))]
   ""
   "*