diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index d63149d0..b9722e8e 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -883,8 +883,13 @@ err_t mmnif_init(struct netif *netif)
 
 	// align mpb size to the granularity of a page size
 	header_size = (header_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
+#if 1
+#warning shmalloc
+	header_start_address = NULL;
+#else
 	header_start_address = (void*) RCCE_shmalloc(header_size * MMNIF_CORES);
 	DEBUGPRINTF("RCCE_shmalloc : %p (size %u)\n", header_start_address, MMNIF_CORES * header_size);
+#endif
 
 	// map physical address in the virtual address space
 	header_start_address = (void*) map_region(0, (size_t) header_start_address, (MMNIF_CORES * header_size) >> PAGE_SHIFT, MAP_KERNEL_SPACE | MAP_WT | MAP_NO_CACHE);
@@ -909,8 +914,13 @@ err_t mmnif_init(struct netif *netif)
 #else
 	// align size to the granularity of a page size
 	heap_size = (heap_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
+#if 1
+#warning SHMALLOC
+	heap_start_address = NULL;
+#else
 	heap_start_address = (void*) RCCE_shmalloc(heap_size * MMNIF_CORES);
 	DEBUGPRINTF("RCCE_shmalloc : %p (size %u)\n", heap_start_address, MMNIF_CORES * header_size);
+#endif
 
 	// map physical address in the virtual address space
 #if USE_CACHE