diff --git a/servers/is/dmp_fs.c b/servers/is/dmp_fs.c
index 0eeea9589..3f3a6ac38 100644
--- a/servers/is/dmp_fs.c
+++ b/servers/is/dmp_fs.c
@@ -11,6 +11,7 @@
 #include "inc.h"
 #include "../mfs/const.h"
 #include "../vfs/fproc.h"
+#include "../vfs/dmap.h"
 #include <minix/dmap.h>
 
 PUBLIC struct fproc fproc[NR_PROCS];