diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index ba3b8a98a0499abcb4b24eff5d8e1201c2215d4e..6a027dc8dbfe7b46643072f36116338974457d8e 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -20,6 +20,7 @@
 #define __LINUX_IOMMU_H
 
 #include <linux/errno.h>
+#include <linux/err.h>
 #include <linux/types.h>
 
 #define IOMMU_READ	(1)