Index: sys/dev/e1000/if_em.c
===================================================================
--- sys/dev/e1000/if_em.c
+++ sys/dev/e1000/if_em.c
@@ -1429,10 +1429,15 @@
        */
        if (adapter->hw.mac.max_frame_size <= 2048)
                adapter->rx_mbuf_sz = MCLBYTES;
+#ifndef CONTIGMALLOC_WORKS
+       else
+               adapter->rx_mbuf_sz = MJUMPAGESIZE;
+#else
        else if (adapter->hw.mac.max_frame_size <= 4096)
                adapter->rx_mbuf_sz = MJUMPAGESIZE;
        else
                adapter->rx_mbuf_sz = MJUM9BYTES;
+#endif
 
        /* Prepare receive descriptors and buffers */
        if (em_setup_receive_structures(adapter)) {
Index: sys/dev/e1000/if_igb.c
===================================================================
--- sys/dev/e1000/if_igb.c
+++ sys/dev/e1000/if_igb.c
@@ -1324,10 +1324,15 @@
        */
        if (adapter->max_frame_size <= 2048)
                adapter->rx_mbuf_sz = MCLBYTES;
+#ifndef CONTIGMALLOC_WORKS
+       else
+               adapter->rx_mbuf_sz = MJUMPAGESIZE;
+#else
        else if (adapter->max_frame_size <= 4096)
                adapter->rx_mbuf_sz = MJUMPAGESIZE;
        else
                adapter->rx_mbuf_sz = MJUM9BYTES;
+#endif
 
        /* Prepare receive descriptors and buffers */
        if (igb_setup_receive_structures(adapter)) {