diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 852012b6fc5bbe98fcdc73ff31b2006f79a16315..16d3e7854ced31b17bc388df31447fff474c8e04 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -84,7 +84,8 @@ static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
  * in either FDI or DP modes only, as HDMI connections will work with both
  * of those
  */
-void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, bool use_fdi_mode)
+static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port,
+				      bool use_fdi_mode)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 reg;