diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index a72f502..c2473a8 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -106,7 +106,7 @@
 	}
 }
 
-void
+static void
 fw_fill_packet(struct fw_packet *packet, int tcode, int tlabel,
 	       int node_id, int generation, int speed,
 	       unsigned long long offset, void *payload, size_t length)