diff --git a/src/pdr.c b/src/pdr.c
index b057e3d..fe28aa9 100644
--- a/src/pdr.c
+++ b/src/pdr.c
@@ -1,6 +1,7 @@
 #include "pdr.h"
 #include "platform.h"
 #include <assert.h>
+#include <endian.h>
 #include <stdlib.h>
 #include <string.h>