diff --git a/arch/sh/drivers/pci/fixups-dreamcast.c b/arch/sh/drivers/pci/fixups-dreamcast.c
index 2bf85cf091e..48c6381fffa 100644
--- a/arch/sh/drivers/pci/fixups-dreamcast.c
+++ b/arch/sh/drivers/pci/fixups-dreamcast.c
@@ -41,6 +41,13 @@ static void __init gapspci_fixup_resources(struct pci_dev *dev)
 		 */
 		dev->resource[1].start	= p->io_resource->start  + 0x100;
 		dev->resource[1].end	= dev->resource[1].start + 0x200 - 1;
+
+		/*
+		 * This is not a normal BAR, prevent any attempts to move
+		 * the BAR, as this will result in a bus lock.
+		 */
+		dev->resource[1].flags |= IORESOURCE_PCI_FIXED;
+
 		/*
 		 * Redirect dma memory allocations to special memory window.
 		 */