diff --git a/gss-serv.c b/gss-serv.c
index 00e3d118b..025a118f8 100644
--- a/gss-serv.c
+++ b/gss-serv.c
@@ -29,6 +29,7 @@
 #ifdef GSSAPI
 
 #include <sys/types.h>
+#include <sys/param.h>
 
 #include <stdarg.h>
 #include <string.h>