diff --git a/backend/artec.c b/backend/artec.c
index 836cc7050..2535bd494 100644
--- a/backend/artec.c
+++ b/backend/artec.c
@@ -134,7 +134,7 @@ static const u_int8_t test_unit_ready[] =
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 };
 
-struct
+static struct
   {
     SANE_String model;		/* product model */
     SANE_String type;		/* type of scanner */