diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 3b5b100480..c6b67c921f 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -10890,7 +10890,7 @@ static int func_header_read(struct ast_channel *chan, char *function, char *data
 
 static struct ast_custom_function sip_header_function = {
 	.name = "SIP_HEADER",
-	.synopsis = "Gets or sets the specified SIP header",
+	.synopsis = "Gets the specified SIP header",
 	.syntax = "SIP_HEADER(<name>)",
 	.read = func_header_read,
 };