diff --git a/e_os.h b/e_os.h
index 4d5e9f92a..2f545403e 100644
--- a/e_os.h
+++ b/e_os.h
@@ -227,6 +227,7 @@ extern "C" {
 #    define _setmode setmode
 #    define _O_TEXT O_TEXT
 #    define _O_BINARY O_BINARY
+#    undef DEBRANDOM
 #    define DEVRANDOM "/dev/urandom\x24"
 #  endif /* __DJGPP__ */