diff --git a/src/lib-sieve/plugins/editheader/cmd-addheader.c b/src/lib-sieve/plugins/editheader/cmd-addheader.c
index 401d65e7a8ad3a35b74156c9f9ce35f2c20427b9..fdf1aec23fbccdc2087e6ea25082ff7f0744dd3b 100644
--- a/src/lib-sieve/plugins/editheader/cmd-addheader.c
+++ b/src/lib-sieve/plugins/editheader/cmd-addheader.c
@@ -76,7 +76,7 @@ static int cmd_addheader_operation_execute
 	(const struct sieve_runtime_env *renv, sieve_size_t *address);
 
 const struct sieve_operation_def addheader_operation = {
-	"addheader",
+	"ADDHEADER",
 	&editheader_extension,
 	EXT_EDITHEADER_OPERATION_ADDHEADER,
 	cmd_addheader_operation_dump,