diff --git a/drivers/gpu/drm/i915/Makefile.header-test b/drivers/gpu/drm/i915/Makefile.header-test
index b1c3e642f621512e3f12d634519d17b99464e172..8f617d5f5d592840f3a74e59f924a2430d8daada 100644
--- a/drivers/gpu/drm/i915/Makefile.header-test
+++ b/drivers/gpu/drm/i915/Makefile.header-test
@@ -6,6 +6,7 @@ header_test := \
 	i915_active_types.h \
 	i915_debugfs.h \
 	i915_drv.h \
+	i915_fixed.h \
 	i915_gem_gtt.h \
 	i915_irq.h \
 	i915_params.h \
diff --git a/drivers/gpu/drm/i915/i915_fixed.h b/drivers/gpu/drm/i915/i915_fixed.h
index 6621595fe74ca5a3c0f2217caa8021ff3b6d2a16..a327094de2bd7e5d3576d9888cfae8ea40549fdb 100644
--- a/drivers/gpu/drm/i915/i915_fixed.h
+++ b/drivers/gpu/drm/i915/i915_fixed.h
@@ -6,6 +6,11 @@
 #ifndef _I915_FIXED_H_
 #define _I915_FIXED_H_
 
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/types.h>
+
 typedef struct {
 	u32 val;
 } uint_fixed_16_16_t;