diff --git a/hw/mainstone.c b/hw/mainstone.c
index cf05675d00..8793b336e2 100644
--- a/hw/mainstone.c
+++ b/hw/mainstone.c
@@ -78,7 +78,7 @@ static void mainstone_common_init(int ram_size, int vga_ram_size,
     mst_irq = mst_irq_init(cpu, MST_FPGA_PHYS, PXA2XX_PIC_GPIO_0);
 
     /* MMC/SD host */
-    pxa2xx_mmci_handlers(cpu->mmc, mst_irq[MMC_IRQ], mst_irq[MMC_IRQ]);
+    pxa2xx_mmci_handlers(cpu->mmc, NULL, mst_irq[MMC_IRQ]);
 
     smc91c111_init(&nd_table[0], MST_ETH_PHYS, mst_irq[ETHERNET_IRQ]);