diff --git a/src/file.c b/src/file.c
index ea45b2c0b..eb4534168 100644
--- a/src/file.c
+++ b/src/file.c
@@ -8,7 +8,12 @@
 #include "mruby/class.h"
 #include "mruby/data.h"
 #include "mruby/string.h"
+
+#if MRUBY_RELEASE_NO < 10000
 #include "error.h"
+#else
+#include "mruby/error.h"
+#endif
 
 #include <sys/file.h>
 #include <fcntl.h>
diff --git a/src/file_test.c b/src/file_test.c
index 872f7aebc..cb1f6229d 100644
--- a/src/file_test.c
+++ b/src/file_test.c
@@ -8,7 +8,12 @@
 #include "mruby/class.h"
 #include "mruby/data.h"
 #include "mruby/string.h"
+
+#if MRUBY_RELEASE_NO < 10000
 #include "error.h"
+#else
+#include "mruby/error.h"
+#endif
 
 #include <sys/file.h>
 #include <libgen.h>
diff --git a/src/io.c b/src/io.c
index 8c9de3667..933078870 100644
--- a/src/io.c
+++ b/src/io.c
@@ -11,7 +11,12 @@
 #include "mruby/string.h"
 #include "mruby/variable.h"
 #include "mruby/ext/io.h"
+
+#if MRUBY_RELEASE_NO < 10000
 #include "error.h"
+#else
+#include "mruby/error.h"
+#endif
 
 static int mrb_io_modestr_to_flags(mrb_state *mrb, const char *modestr);
 static int mrb_io_modenum_to_flags(mrb_state *mrb, int modenum);