diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index c9a4690bf8b1..14eef8f8d16a 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -32,6 +32,7 @@
 #include <linux/stop_machine.h>
 
 #include <asm/set_memory.h>
+#include <asm/smp.h>
 
 #include <drm/i915_drm.h>