diff --git a/src/error.h b/include/mruby/error.h
similarity index 100%
rename from src/error.h
rename to include/mruby/error.h
diff --git a/src/class.c b/src/class.c
index 58eaaab0e..11a21f7a7 100644
--- a/src/class.c
+++ b/src/class.c
@@ -13,7 +13,7 @@
 #include "mruby/proc.h"
 #include "mruby/string.h"
 #include "mruby/variable.h"
-#include "error.h"
+#include "mruby/error.h"
 
 KHASH_DEFINE(mt, mrb_sym, struct RProc*, 1, kh_int_hash_func, kh_int_hash_equal)
 
diff --git a/src/error.c b/src/error.c
index 1ee891619..8d0ec67e0 100644
--- a/src/error.c
+++ b/src/error.c
@@ -14,7 +14,7 @@
 #include "mruby/string.h"
 #include "mruby/variable.h"
 #include "mruby/debug.h"
-#include "error.h"
+#include "mruby/error.h"
 
 mrb_value
 mrb_exc_new(mrb_state *mrb, struct RClass *c, const char *ptr, long len)
diff --git a/src/kernel.c b/src/kernel.c
index f13a13ea2..9aec33d67 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -10,7 +10,7 @@
 #include "mruby/proc.h"
 #include "mruby/string.h"
 #include "mruby/variable.h"
-#include "error.h"
+#include "mruby/error.h"
 
 typedef enum {
     NOEX_PUBLIC    = 0x00,
diff --git a/src/vm.c b/src/vm.c
index e82806e4d..f11caedd7 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -17,7 +17,7 @@
 #include "mruby/range.h"
 #include "mruby/string.h"
 #include "mruby/variable.h"
-#include "error.h"
+#include "mruby/error.h"
 #include "opcode.h"
 #include "value_array.h"