diff --git a/mach/proto/ncg/nextem.c b/mach/proto/ncg/nextem.c
index 4b74b4400..a9616efda 100644
--- a/mach/proto/ncg/nextem.c
+++ b/mach/proto/ncg/nextem.c
@@ -69,8 +69,11 @@ byte *trypat(bp,len) register byte *bp; {
 #ifndef NDEBUG
 	if (Debug) {
 		fprintf(stderr,"Matched:");
-		for (i=0;i<patlen;i++)
+		for (i=0;i<patlen;i++) {
 			fprintf(stderr," %3.3s",em_mnem[emp[i].em_instr-sp_fmnem]);
+			if (emp[i].em_soper)
+				printf(" %s",emp[i].em_soper);
+		}
 		fprintf(stderr,"\n");
 	}
 #endif