diff --git a/man/man3/9pclient.3 b/man/man3/9pclient.3
index 4d685d71..e96ed16c 100644
--- a/man/man3/9pclient.3
+++ b/man/man3/9pclient.3
@@ -8,6 +8,8 @@ CFid, CFsys, fsinit, fsmount, fsroot, fssetroot, fsunmount, nsinit, nsmount, fsv
 .PP
 .B #include <fcall.h>
 .PP
+.B #include <thread.h>
+.PP
 .B #include <9pclient.h>
 .ta +\w'\fLCFsys* 'u
 .PP