diff --git a/contrib/oid2name/oid2name.c b/contrib/oid2name/oid2name.c
index 05c06ccc684..c7ba1bd1010 100644
--- a/contrib/oid2name/oid2name.c
+++ b/contrib/oid2name/oid2name.c
@@ -177,7 +177,7 @@ help(const char *progname)
 {
 	printf("%s helps examining the file structure used by PostgreSQL.\n\n"
 		   "Usage:\n"
-		   "  %s [OPTIONS]...\n"
+		   "  %s [OPTION]...\n"
 		   "\nOptions:\n"
 		   "  -d DBNAME    database to connect to\n"
 		   "  -f FILENODE  show info for table with given file node\n"
diff --git a/contrib/pg_upgrade/option.c b/contrib/pg_upgrade/option.c
index a97be28d92c..06af6d42781 100644
--- a/contrib/pg_upgrade/option.c
+++ b/contrib/pg_upgrade/option.c
@@ -218,7 +218,7 @@ usage(void)
 {
 	printf(_("pg_upgrade upgrades a PostgreSQL cluster to a different major version.\n\
 \nUsage:\n\
-  pg_upgrade [OPTIONS]...\n\
+  pg_upgrade [OPTION]...\n\
 \n\
 Options:\n\
   -b, --old-bindir=OLDBINDIR    old cluster executable directory\n\
diff --git a/contrib/pgbench/pgbench.c b/contrib/pgbench/pgbench.c
index 9081f0955ff..2e147d91caf 100644
--- a/contrib/pgbench/pgbench.c
+++ b/contrib/pgbench/pgbench.c
@@ -338,7 +338,7 @@ usage(const char *progname)
 {
 	printf("%s is a benchmarking tool for PostgreSQL.\n\n"
 		   "Usage:\n"
-		   "  %s [OPTIONS]... [DBNAME]\n"
+		   "  %s [OPTION]... [DBNAME]\n"
 		   "\nInitialization options:\n"
 		   "  -i           invokes initialization mode\n"
 		   "  -F NUM       fill factor\n"