diff --git a/mach/proto/ncg/reg.c b/mach/proto/ncg/reg.c
index 9f645fbec..b71d06d43 100644
--- a/mach/proto/ncg/reg.c
+++ b/mach/proto/ncg/reg.c
@@ -73,17 +73,21 @@ erasereg(regno) {
 	register struct reginfo *rp;
 	register int i;
 
+#if MAXMEMBERS==0
 	rp = &machregs[regno];
 	rp->r_contents.t_token = 0;
 	for (i=0;i<TOKENSIZE;i++)
 		rp->r_contents.t_att[i].aw = 0;
 
-#if MAXMEMBERS==0
 	awayreg(regno);
 #else
 	for (rp=machregs+1;rp<machregs+NREGS;rp++)
-		if (rp->r_clash[regno>>4]&(1<<(regno&017)))
+		if (rp->r_clash[regno>>4]&(1<<(regno&017))) {
+			rp->r_contents.t_token = 0;
+			for (i=0;i<TOKENSIZE;i++)
+				rp->r_contents.t_att[i].aw = 0;
 			awayreg(rp-machregs);
+		}
 #endif
 }