diff -r b1bd262dc055 sys/src/cmd/awk/lib.c
--- a/sys/src/cmd/awk/lib.c	Mon Apr 15 19:48:03 2019 +0000
+++ b/sys/src/cmd/awk/lib.c	Mon Apr 15 15:52:22 2019 -0700
@@ -167,7 +167,7 @@
 
 void nextfile(void)
 {
-	if (infile != &stdin)
+	if (infile && infile != &stdin)
 		Bterm(infile);
 	infile = nil;
 	argno++;