diff --git a/drivers/staging/greybus/core.c b/drivers/staging/greybus/core.c
index 23e0359d18c2..a4d7057a061c 100644
--- a/drivers/staging/greybus/core.c
+++ b/drivers/staging/greybus/core.c
@@ -18,8 +18,6 @@
 
 #include "greybus.h"
 
-extern struct ida greybus_endo_id_map;
-
 /* Allow greybus to be disabled at boot if needed */
 static bool nogreybus;
 #ifdef MODULE
diff --git a/drivers/staging/greybus/endo.h b/drivers/staging/greybus/endo.h
index 2547b63e59bb..63dbadf5589f 100644
--- a/drivers/staging/greybus/endo.h
+++ b/drivers/staging/greybus/endo.h
@@ -46,6 +46,7 @@ struct gb_endo {
 };
 #define to_gb_endo(d) container_of(d, struct gb_endo, dev)
 
+extern struct ida greybus_endo_id_map;
 
 /* Greybus "private" definitions */
 struct greybus_host_device;