1 files changed, 1 insertions, 0 deletions

diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index c5ca993679ec..51cdca8365c9 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -51,6 +51,7 @@
    parameter called 'debug'. */
 #define v4l_dbg(level, client, fmt, arg...)                                  \
         do {                                                                 \
+                extern int debug;                                            \
                 if (debug >= (level))                                        \
                         v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
         } while (0)