diff --git a/frontends/src/jp/constants.py b/frontends/src/jp/constants.py
index 673e70dc..256ffe8f 100644
--- a/frontends/src/jp/constants.py
+++ b/frontends/src/jp/constants.py
@@ -34,6 +34,7 @@ class Const(constants.Const):
     EXIT_OK = 0
     EXIT_ERROR = 1 # generic error, when nothing else match
     EXIT_BAD_ARG = 2 # arguments given by user are bad
+    EXIT_NOT_FOUND = 16 # an item required by a command was not found
     EXIT_FILE_NOT_EXE = 126 # a file to be executed was found, but it was not an executable utility (cf. man 1 exit)
     EXIT_CMD_NOT_FOUND = 127 # a utility to be executed was not found (cf. man 1 exit)
     EXIT_SIGNAL_INT = 128 # a command was interrupted by a signal (cf. man 1 exit)