set default FLTFLAGS for a fatty stack
diff --git a/Makefile.flags b/Makefile.flags
index e4cdc45..988d6e7 100644
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -68,3 +68,6 @@
 endif
 
 #LDFLAGS += -nostdlib
+
+# Busybox is a stack-fatty so make sure we increase default size
+FLTFLAGS += -s 20000