diff --git a/src/process.h b/src/process.h
index 73674b7358e..47c64dfb989 100644
--- a/src/process.h
+++ b/src/process.h
@@ -165,6 +165,7 @@ extern Lisp_Object Qeuid, Qegid, Qcomm, Qstate, Qppid, Qpgrp, Qsess, Qttname;
 extern Lisp_Object Qminflt, Qmajflt, Qcminflt, Qcmajflt, Qutime, Qstime;
 extern Lisp_Object Qcutime, Qpri, Qnice, Qthcount, Qstart, Qvsize, Qrss, Qargs;
 extern Lisp_Object Quser, Qgroup, Qetime, Qpcpu, Qpmem, Qtpgid, Qcstime;
+extern Lisp_Object Qtime, Qctime;
 
 extern Lisp_Object list_system_processes (void);
 extern Lisp_Object system_process_attributes (Lisp_Object);