diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 2e0e6aff8f70..a3ce6918577d 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -19,6 +19,8 @@
  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#define dev_fmt(fmt)	"gart: " fmt
+
 #include <linux/io.h>
 #include <linux/iommu.h>
 #include <linux/list.h>