diff --git a/examples/vkdemos/vulkan.c b/examples/vkdemos/vulkan.c
index a0eeabb..56f662a 100644
--- a/examples/vkdemos/vulkan.c
+++ b/examples/vkdemos/vulkan.c
@@ -5,7 +5,6 @@
  * ioixd maintains this file. nishi doesn't know vulkan at all
  */
 
-#include "Mw/Error.h"
 #include <Mw/Milsko.h>
 #include <Mw/Widget/Vulkan.h>
 
diff --git a/include/Mw/Milsko.h b/include/Mw/Milsko.h
index 4bd157a..07a560b 100644
--- a/include/Mw/Milsko.h
+++ b/include/Mw/Milsko.h
@@ -12,7 +12,6 @@
 #include <Mw/Core.h>
 #include <Mw/Default.h>
 #include <Mw/Font.h>
-#include <Mw/Error.h>
 #include <Mw/Constants.h>
 #include <Mw/Unicode.h>
 #include <Mw/String.h>
diff --git a/include/Mw/Widget/Vulkan.h b/include/Mw/Widget/Vulkan.h
index a96beff..9af22b8 100644
--- a/include/Mw/Widget/Vulkan.h
+++ b/include/Mw/Widget/Vulkan.h
@@ -21,7 +21,6 @@
 #include <Mw/MachDep.h>
 #include <Mw/TypeDefs.h>
 #include <Mw/Core.h>
-#include <Mw/Error.h>
 
 #ifdef __cplusplus
 extern "C" {