diff --git a/package/postgresql/postgresql.mk b/package/postgresql/postgresql.mk
index 35728217ec..584ab47bf5 100644
--- a/package/postgresql/postgresql.mk
+++ b/package/postgresql/postgresql.mk
@@ -12,7 +12,7 @@ POSTGRESQL_LICENSE_FILES = COPYRIGHT
 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_format="%lld" \
+		      pgac_cv_snprintf_long_long_int_modifier="%lld" \
 		      pgac_cv_snprintf_size_t_support=yes
 POSTGRESQL_CONF_OPTS = --disable-rpath