diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index b2d10e16..c7398cad 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -142,7 +142,7 @@
 
 #ifdef __linux__
 typedef int drm_ioctl_t( DRM_OS_IOCTL );
-#endif
+#endif /* __linux__ */
 
 typedef struct drm_pci_list {
 	u16 vendor;
diff --git a/linux/drmP.h b/linux/drmP.h
index b2d10e16..c7398cad 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -142,7 +142,7 @@
 
 #ifdef __linux__
 typedef int drm_ioctl_t( DRM_OS_IOCTL );
-#endif
+#endif /* __linux__ */
 
 typedef struct drm_pci_list {
 	u16 vendor;