diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d985ed55658..80f2afae697 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2003-02-25  Richard Henderson  <rth@redhat.com>
+
+	* config/i386/i386.c (function_arg): Pass variable sized
+	structures correctly on the stack.
+
 2003-02-25  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* reload1.c (reload_cse_move2add): Use STRICT_LOW_PART if PLUS
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index c464b6c0674..53df0892172 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -2468,6 +2468,9 @@ function_arg (cum, mode, type, named)
 	break;
 
       case BLKmode:
+	if (bytes < 0)
+	  break;
+	/* FALLTHRU */
       case DImode:
       case SImode:
       case HImode: