diff --git a/lib/usb/usb_f107.c b/lib/usb/usb_f107.c
index 924ac3a6..1620482b 100644
--- a/lib/usb/usb_f107.c
+++ b/lib/usb/usb_f107.c
@@ -21,6 +21,7 @@
 #include <libopencm3/cm3/common.h>
 #include <libopencm3/stm32/tools.h>
 #include <libopencm3/stm32/otg_fs.h>
+#include <libopencm3/stm32/rcc.h>
 #include <libopencm3/usb/usbd.h>
 #include "usb_private.h"
 #include "usb_fx07_common.h"
diff --git a/lib/usb/usb_f207.c b/lib/usb/usb_f207.c
index 7a940c72..40f1efce 100644
--- a/lib/usb/usb_f207.c
+++ b/lib/usb/usb_f207.c
@@ -21,6 +21,7 @@
 #include <libopencm3/cm3/common.h>
 #include <libopencm3/stm32/tools.h>
 #include <libopencm3/stm32/otg_hs.h>
+#include <libopencm3/stm32/rcc.h>
 #include <libopencm3/usb/usbd.h>
 #include "usb_private.h"
 #include "usb_fx07_common.h"