diff --git a/usr.bin/gcore/aoutcore.c b/usr.bin/gcore/aoutcore.c
index 3eb5a195bf2b..c61bad8af8d3 100644
--- a/usr.bin/gcore/aoutcore.c
+++ b/usr.bin/gcore/aoutcore.c
@@ -333,6 +333,6 @@ userdump(fd, kp, addr, npage)
 void
 usage()
 {
-	(void)fprintf(stderr, "usage: gcore [-s] [-c core] executable pid\n");
+	(void)fprintf(stderr, "usage: gcore [-s] [-c core] [executable] pid\n");
 	exit(1);
 }
diff --git a/usr.bin/gcore/gcore.c b/usr.bin/gcore/gcore.c
index 3eb5a195bf2b..c61bad8af8d3 100644
--- a/usr.bin/gcore/gcore.c
+++ b/usr.bin/gcore/gcore.c
@@ -333,6 +333,6 @@ userdump(fd, kp, addr, npage)
 void
 usage()
 {
-	(void)fprintf(stderr, "usage: gcore [-s] [-c core] executable pid\n");
+	(void)fprintf(stderr, "usage: gcore [-s] [-c core] [executable] pid\n");
 	exit(1);
 }