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-rw-r--r--doc/user/signal.t1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/user/signal.t b/doc/user/signal.t
index c441338d2a..2d0cf47280 100644
--- a/doc/user/signal.t
+++ b/doc/user/signal.t
@@ -359,6 +359,7 @@ procedure Signal_Send (
@subheading DIRECTIVE STATUS CODES:
@code{@value{RPREFIX}SUCCESSFUL} - signal sent successfully@*
@code{@value{RPREFIX}INVALID_ID} - task id invalid@*
+@code{@value{RPREFIX}INVALID_NUMBER} - empty signal set@*
@code{@value{RPREFIX}NOT_DEFINED} - ASR invalid
@subheading DESCRIPTION: