Fix undefined reference to `fsp_detect'
diff --git a/drivers/input/mouse/sentelic.h b/drivers/input/mouse/sentelic.h
index 334de19..06fc881 100644
--- a/drivers/input/mouse/sentelic.h
+++ b/drivers/input/mouse/sentelic.h
@@ -115,7 +115,7 @@ struct fsp_data {
 extern int fsp_detect(struct psmouse *psmouse, bool set_properties);
 extern int fsp_init(struct psmouse *psmouse);
 #else
-inline int fsp_detect(struct psmouse *psmouse, bool set_properties)
+static inline int fsp_detect(struct psmouse *psmouse, bool set_properties)
 {
 	return -ENOSYS;
 }