diff --git a/mach/vax4/libem/cui.s b/mach/vax4/libem/cui.s
index 8d2f35f0..4fcf3f4a 100644
--- a/mach/vax4/libem/cui.s
+++ b/mach/vax4/libem/cui.s
@@ -22,4 +22,5 @@ Lerr:
 	jmp     .fat
 Liovfl:
 	pushl	$EIOVFL
+	pushl	r1
 	jmp     .trp