diff --git a/sys/dev/gpio/gpioc.c b/sys/dev/gpio/gpioc.c
--- a/sys/dev/gpio/gpioc.c
+++ b/sys/dev/gpio/gpioc.c
@@ -159,7 +159,7 @@
 	.f_detach =	gpioc_kqdetach,
 	.f_event =	gpioc_kqread,
 	.f_touch =	NULL,
-	.f_copy = knote_triv_copy,
+	.f_copy =	knote_triv_copy,
 };
 
 static struct gpioc_pin_event *
diff --git a/sys/dev/hid/hidraw.c b/sys/dev/hid/hidraw.c
--- a/sys/dev/hid/hidraw.c
+++ b/sys/dev/hid/hidraw.c
@@ -182,7 +182,7 @@
 	.f_isfd =	1,
 	.f_detach =	hidraw_kqdetach,
 	.f_event =	hidraw_kqread,
-	.f_copy = knote_triv_copy,
+	.f_copy =	knote_triv_copy,
 };
 
 static void
diff --git a/sys/dev/hid/u2f.c b/sys/dev/hid/u2f.c
--- a/sys/dev/hid/u2f.c
+++ b/sys/dev/hid/u2f.c
@@ -132,7 +132,7 @@
 	.f_isfd =	1,
 	.f_detach =	u2f_kqdetach,
 	.f_event =	u2f_kqread,
-	.f_copy = knote_triv_copy,
+	.f_copy =	knote_triv_copy,
 };
 
 static int
diff --git a/sys/dev/null/null.c b/sys/dev/null/null.c
--- a/sys/dev/null/null.c
+++ b/sys/dev/null/null.c
@@ -62,13 +62,13 @@
 static const struct filterops one_fop = {
 	.f_isfd =	1,
 	.f_event =	one_ev,
-	.f_copy = knote_triv_copy,
+	.f_copy =	knote_triv_copy,
 };
 
 static const struct filterops zero_fop = {
 	.f_isfd =	1,
 	.f_event =	zero_ev,
-	.f_copy = knote_triv_copy,
+	.f_copy =	knote_triv_copy,
 };
 
 static struct cdevsw full_cdevsw = {