diff --git a/srfi/106.sld b/srfi/106.sld
index c6079e8c..ce0341dc 100644
--- a/srfi/106.sld
+++ b/srfi/106.sld
@@ -107,8 +107,17 @@
         return_closcall1(data, k, obj_int2obj(sockfd)); ")
 
     (define (socket-merge-flags flags)
-    )
+      (if (null? flags) 
+          0
+          (let ((result (car flags)))
+            (for-each 
+              (lambda (flag)
+                (set! result (num-or result flag)))
+              (cdr flags)))))
 
+    (define-c num-or
+      "(void *data, int argc, closure _, object k, object n1, object n2)"
+      " return_closcall1(data, k, Cyc_bit_or(data, n1, n2));")
     ;(define (socket-purge-flags flags)
     ;)