diff --git a/dis-asm.h b/dis-asm.h
index ebfb299..8c4bb5d 100644
--- a/dis-asm.h
+++ b/dis-asm.h
@@ -9,6 +9,7 @@
 #ifndef DIS_ASM_H
 #define DIS_ASM_H
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>
@@ -20,6 +21,8 @@
 typedef uint8_t bfd_byte;
 #define sprintf_vma(s,x) sprintf (s, "%0" PRIx64, x)
 
+#define BFD64
+
 enum bfd_flavour {
   bfd_target_unknown_flavour,
   bfd_target_aout_flavour,