diff --git a/lib/replace/system/network.h b/lib/replace/system/network.h
index 2ec9ebde452..a4e6a7e31a6 100644
--- a/lib/replace/system/network.h
+++ b/lib/replace/system/network.h
@@ -331,8 +331,6 @@ typedef unsigned short int sa_family_t;
      * which might return 512 or bigger
      */
 #   define IOV_MAX 512
-#  else
-#   warning IOV_MAX and UIO_MAXIOV undefined
 #  endif
 # endif
 #endif