diff --git a/configure/CONFIG_ADDONS b/configure/CONFIG_ADDONS
index 7b4bbac8c..b11694504 100644
--- a/configure/CONFIG_ADDONS
+++ b/configure/CONFIG_ADDONS
@@ -255,3 +255,14 @@ RCS += $(RCS_DEFAULT)
 endif
 endif
 
+#
+#	concat specific sequencer flags
+#
+ifneq ($(strip $(SNCFLAGS_$(OS_CLASS))),)
+SNCFLAGS += $(subst -nil-,,$(SNCFLAGS_$(OS_CLASS)))
+else
+ifdef SNCFLAGS_DEFAULT
+SNCFLAGS += $(SNCFLAGS_DEFAULT)
+endif
+endif
+