diff --git a/src/backend/libpq/auth-oauth.c b/src/backend/libpq/auth-oauth.c
index a6cab0c3bf4..b769931ca4f 100644
--- a/src/backend/libpq/auth-oauth.c
+++ b/src/backend/libpq/auth-oauth.c
@@ -867,7 +867,7 @@ check_oauth_validator(HbaLine *hbaline, int elevel, char **err_msg)
 	{
 		ereport(elevel,
 				errcode(ERRCODE_CONFIG_FILE_ERROR),
-				errmsg("parameter \%s\" must be set for authentication method \"%s\"",
+				errmsg("parameter \"%s\" must be set for authentication method \"%s\"",
 					   "oauth_validator_libraries", "oauth"),
 				errcontext("line %d of configuration file \"%s\"",
 						   line_num, file_name));