diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
index b057386b946..30785a66a4d 100644
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -43,7 +43,7 @@
 
 #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
 
-struct gbm_device *devices[16];
+static struct gbm_device *devices[16];
 
 static int device_num = 0;