diff --git a/mrbgems/mruby-dir/src/dir.c b/mrbgems/mruby-dir/src/dir.c
index d7d00436a..80f70df19 100644
--- a/mrbgems/mruby-dir/src/dir.c
+++ b/mrbgems/mruby-dir/src/dir.c
@@ -166,7 +166,7 @@ mrb_dir_chdir(mrb_state *mrb, mrb_value klass)
 static mrb_value
 mrb_dir_chroot(mrb_state *mrb, mrb_value self)
 {
-#if defined(_WIN32) || defined(_WIN64) || defined(__ANDROID__)
+#if defined(_WIN32) || defined(_WIN64) || defined(__ANDROID__) || defined(__MSDOS__)
   mrb_raise(mrb, E_NOTIMP_ERROR, "chroot() unreliable on your system");
   return mrb_fixnum_value(0);
 #else
diff --git a/mrbgems/mruby-io/src/file.c b/mrbgems/mruby-io/src/file.c
index 44aefdf45..2bfef3030 100644
--- a/mrbgems/mruby-io/src/file.c
+++ b/mrbgems/mruby-io/src/file.c
@@ -38,7 +38,9 @@
   #define GETCWD getcwd
   #define CHMOD(a, b) chmod(a,b)
   #include <sys/file.h>
+#ifndef __DJGPP__
   #include <libgen.h>
+#endif
   #include <sys/param.h>
   #include <pwd.h>
 #endif
diff --git a/mrbgems/mruby-io/src/file_test.c b/mrbgems/mruby-io/src/file_test.c
index e7d23406f..1d7aa564e 100644
--- a/mrbgems/mruby-io/src/file_test.c
+++ b/mrbgems/mruby-io/src/file_test.c
@@ -20,7 +20,9 @@
   #include <sys/file.h>
   #include <sys/param.h>
   #include <sys/wait.h>
+#ifndef __DJGPP__
   #include <libgen.h>
+#endif
   #include <pwd.h>
   #include <unistd.h>
 #endif
diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index 5dd89ce68..560acde62 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -46,7 +46,11 @@
   #include <unistd.h>
   typedef size_t fsize_t;
   typedef time_t ftime_t;
+#ifdef __DJGPP__
+  typedef long fsuseconds_t;
+#else
   typedef suseconds_t fsuseconds_t;
+#endif
   typedef mode_t fmode_t;
   typedef ssize_t fssize_t;
 #endif