diff --git a/includes/cf/alphaosf.h b/includes/cf/alphaosf.h
index 58c4bfbd..e8298ba3 100644
--- a/includes/cf/alphaosf.h
+++ b/includes/cf/alphaosf.h
@@ -43,6 +43,7 @@ typedef int int32_t;
 typedef unsigned char u_int8_t;
 typedef unsigned short u_int16_t;
 typedef unsigned int u_int32_t;
+typedef unsigned long u_int64_t;
 
 #include <syslog.h>
 #include <sys/types.h>