diff --git a/sys/conf/files b/sys/conf/files
index c725543a6717..1cf3ad02ce44 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -2700,11 +2700,11 @@ dev/puc/puc.c			optional puc
 dev/puc/puc_cfg.c		optional puc
 dev/puc/puc_pccard.c		optional puc pccard
 dev/puc/puc_pci.c		optional puc pci
-dev/pwm/pwmc.c			optional pwm
-dev/pwm/pwmbus.c		optional pwm
-dev/pwm/pwm_if.m		optional pwm
-dev/pwm/pwmbus_if.m		optional pwm
-dev/pwm/ofw_pwm.c		optional pwm fdt
+dev/pwm/pwmc.c			optional pwm | pwmc
+dev/pwm/pwmbus.c		optional pwm | pwmbus
+dev/pwm/pwm_if.m		optional pwm | pwmbus
+dev/pwm/pwmbus_if.m		optional pwm | pwmbus
+dev/pwm/ofw_pwm.c		optional pwm fdt | pwmbus fdt
 dev/quicc/quicc_core.c		optional quicc
 dev/ral/rt2560.c		optional ral
 dev/ral/rt2661.c		optional ral