Index: usr.bin/hexdump/display.c
===================================================================
--- usr.bin/hexdump/display.c
+++ usr.bin/hexdump/display.c
@@ -366,7 +366,7 @@
 		/*
 		 * We've opened our last input file; enter capsicum sandbox.
 		 */
-		if (*_argv == NULL) {
+		if (*(_argv + 1) == NULL) {
 			if (cap_enter() < 0 && errno != ENOSYS)
 				err(1, "unable to enter capability mode");
 		}