--- include/platform_defs.h.in
+++ include/platform_defs.h.in
@@ -37,8 +37,13 @@
 typedef signed short		__s16;
 typedef unsigned int		__u32;
 typedef signed int		__s32;
+#ifdef __powerpc64__
+typedef unsigned long int	__u64;
+typedef signed long int		__s64;
+#else
 typedef unsigned long long int	__u64;
 typedef signed long long int	__s64;
+#endif
 
 typedef __u16			__be16;
 typedef __u32			__be32;