diff -uNr ssh-2.0.10.orig/lib/sshutil/sshencode.c ssh-2.0.10/lib/sshutil/sshencode.c
--- ssh-2.0.10.orig/lib/sshutil/sshencode.c	Thu May 28 17:09:41 1998
+++ ssh-2.0.10/lib/sshutil/sshencode.c	Fri Oct 30 01:56:42 1998
@@ -89,7 +89,11 @@
 
 	case SSH_FORMAT_EXTENDED:
 	  encoder = va_arg(ap, SshEncoder);
+#ifndef __powerpc__
 	  (*encoder)(buffer, &ap);
+#else
+	  (*encoder)(buffer, (va_list *)ap);
+#endif
 	  break;
 	  
 	case SSH_FORMAT_END:
@@ -497,8 +501,13 @@
 	  decoder = va_arg(ap, SshDecoder);
 
 	  /* Try decoding. */
+#ifndef __powerpc__
 	  start_of_ap = ap;
 	  size = (*decoder)(buf + offset, len - offset, &ap);
+#else
+	  __va_copy(start_of_ap, ap);
+	  size = (*decoder)(buf + offset, len - offset, (va_list *)ap);
+#endif
 	  if (size == 0)
 	    goto fail;
 
@@ -509,7 +518,11 @@
 	    decoders = ssh_xrealloc(decoders,
 				    (num_decoders + 1) * sizeof(*decoders));
 	  decoders[num_decoders].decoder = decoder;
+#ifndef __powerpc__
 	  decoders[num_decoders].ap = start_of_ap;
+#else
+	  __va_copy(decoders[num_decoders].ap, start_of_ap);
+#endif
 	  num_decoders++;
 
 	  /* Move over parsed data. */
@@ -540,7 +553,11 @@
   if (num_decoders > 0)
     {
       for (i = 0; i < num_decoders; i++)
+#ifndef __powerpc__
 	(*decoders[i].decoder)(SSH_DECODE_FREE, 0, &decoders[i].ap);
+#else
+	(*decoders[i].decoder)(SSH_DECODE_FREE, 0, (va_list *)decoders[i].ap);
+#endif
       ssh_xfree(decoders);
     }
   return 0;