diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index 53b872c105d2..38af5d1cc59f 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -215,7 +215,7 @@ Connectors state change detection must be cleanup up with a call to
 Output discovery and initialization example
 -------------------------------------------
 
-::
+.. code-block:: c
 
     void intel_crt_init(struct drm_device *dev)
     {
diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
index bca808535dfd..cb5daffcd6be 100644
--- a/Documentation/gpu/drm-mm.rst
+++ b/Documentation/gpu/drm-mm.rst
@@ -45,7 +45,7 @@ the radeon_ttm.c file for an example of usage.
 
 The ttm_global_reference structure is made up of several fields:
 
-::
+.. code-block:: c
 
               struct ttm_global_reference {
                       enum ttm_global_types global_type;