diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c
index ddabdb3f90..6340c1eaf8 100644
--- a/hw/net/cadence_gem.c
+++ b/hw/net/cadence_gem.c
@@ -987,8 +987,9 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size)
             return -1;
         }
 
-        DB_PRINT("copy %d bytes to 0x%x\n", MIN(bytes_to_copy, rxbufsize),
-                rx_desc_get_buffer(s->rx_desc[q]));
+        DB_PRINT("copy %u bytes to 0x%" PRIx64 "\n",
+                 MIN(bytes_to_copy, rxbufsize),
+                 rx_desc_get_buffer(s, s->rx_desc[q]));
 
         /* Copy packet data to emulated DMA buffer */
         address_space_write(&s->dma_as, rx_desc_get_buffer(s, s->rx_desc[q]) +
@@ -1159,9 +1160,9 @@ static void gem_transmit(CadenceGEMState *s)
 
             if (tx_desc_get_length(desc) > sizeof(tx_packet) -
                                                (p - tx_packet)) {
-                DB_PRINT("TX descriptor @ 0x%x too large: size 0x%x space " \
-                         "0x%x\n", (unsigned)packet_desc_addr,
-                         (unsigned)tx_desc_get_length(desc),
+                DB_PRINT("TX descriptor @ 0x%" HWADDR_PRIx \
+                         " too large: size 0x%x space 0x%zx\n",
+                         packet_desc_addr, tx_desc_get_length(desc),
                          sizeof(tx_packet) - (p - tx_packet));
                 break;
             }