diff -r -u fastforward-0.51/cdbmake_add.c fastforward-0.51-fixed/cdbmake_add.c
--- fastforward-0.51/cdbmake_add.c	1998-05-19 19:25:42.000000000 +0300
+++ fastforward-0.51-fixed/cdbmake_add.c	2017-06-20 15:03:15.916043326 +0300
@@ -1,4 +1,5 @@
 #include "cdbmake.h"
+#include "alloc.h"
 
 void cdbmake_init(cdbm)
 struct cdbmake *cdbm;
diff -r -u fastforward-0.51/strset.c fastforward-0.51-fixed/strset.c
--- fastforward-0.51/strset.c	1998-05-19 19:25:42.000000000 +0300
+++ fastforward-0.51-fixed/strset.c	2017-06-20 15:01:59.604447413 +0300
@@ -1,6 +1,7 @@
 #include "strset.h"
 #include "str.h"
 #include "byte.h"
+#include "alloc.h"
 
 uint32 strset_hash(s)
 char *s;