diff --git a/lib/libusbhid/usbhid.h b/lib/libusbhid/usbhid.h
index ed652718863c..af3228f17c42 100644
--- a/lib/libusbhid/usbhid.h
+++ b/lib/libusbhid/usbhid.h
@@ -81,6 +81,8 @@ typedef struct hid_item {
 #define HID_PAGE(u) (((u) >> 16) & 0xffff)
 #define HID_USAGE(u) ((u) & 0xffff)
 
+__BEGIN_DECLS
+
 /* Obtaining a report descriptor, descr.c: */
 report_desc_t hid_get_report_desc(int file);
 report_desc_t hid_use_report_desc(unsigned char *data, unsigned int size);
@@ -103,3 +105,5 @@ int hid_parse_usage_page(const char *name);
 /* Extracting/insertion of data, data.c: */
 int hid_get_data(const void *p, const hid_item_t *h);
 void hid_set_data(void *p, const hid_item_t *h, int data);
+
+__END_DECLS