diff --git a/package/postgresql/postgresql.mk b/package/postgresql/postgresql.mk
index d46e8c0ec8..786ef4876a 100644
--- a/package/postgresql/postgresql.mk
+++ b/package/postgresql/postgresql.mk
@@ -13,7 +13,7 @@ POSTGRESQL_INSTALL_STAGING = YES
 POSTGRESQL_CONFIG_SCRIPTS = pg_config
 POSTGRESQL_CONF_ENV = \
 	ac_cv_type_struct_sockaddr_in6=yes \
-	pgac_cv_snprintf_long_long_int_modifier="%lld" \
+	pgac_cv_snprintf_long_long_int_modifier="ll" \
 	pgac_cv_snprintf_size_t_support=yes
 POSTGRESQL_CONF_OPTS = --disable-rpath