diff --git a/hw/ppc/pnv_lpc.c b/hw/ppc/pnv_lpc.c
index 2317d1e62c..402c4fefa8 100644
--- a/hw/ppc/pnv_lpc.c
+++ b/hw/ppc/pnv_lpc.c
@@ -79,6 +79,7 @@ enum {
 
 #define ISA_IO_SIZE             0x00010000
 #define ISA_MEM_SIZE            0x10000000
+#define ISA_FW_SIZE             0x10000000
 #define LPC_IO_OPB_ADDR         0xd0010000
 #define LPC_IO_OPB_SIZE         0x00010000
 #define LPC_MEM_OPB_ADDR        0xe0010000
@@ -429,6 +430,7 @@ static void pnv_lpc_realize(DeviceState *dev, Error **errp)
      */
     memory_region_init(&lpc->isa_io, OBJECT(dev), "isa-io", ISA_IO_SIZE);
     memory_region_init(&lpc->isa_mem, OBJECT(dev), "isa-mem", ISA_MEM_SIZE);
+    memory_region_init(&lpc->isa_fw, OBJECT(dev),  "isa-fw", ISA_FW_SIZE);
 
     /* Create windows from the OPB space to the ISA space */
     memory_region_init_alias(&lpc->opb_isa_io, OBJECT(dev), "lpc-isa-io",
@@ -440,7 +442,7 @@ static void pnv_lpc_realize(DeviceState *dev, Error **errp)
     memory_region_add_subregion(&lpc->opb_mr, LPC_MEM_OPB_ADDR,
                                 &lpc->opb_isa_mem);
     memory_region_init_alias(&lpc->opb_isa_fw, OBJECT(dev), "lpc-isa-fw",
-                             &lpc->isa_mem, 0, LPC_FW_OPB_SIZE);
+                             &lpc->isa_fw, 0, LPC_FW_OPB_SIZE);
     memory_region_add_subregion(&lpc->opb_mr, LPC_FW_OPB_ADDR,
                                 &lpc->opb_isa_fw);
 
diff --git a/include/hw/ppc/pnv_lpc.h b/include/hw/ppc/pnv_lpc.h
index 023b4f0fec..53fdd5bb64 100644
--- a/include/hw/ppc/pnv_lpc.h
+++ b/include/hw/ppc/pnv_lpc.h
@@ -38,6 +38,7 @@ typedef struct PnvLpcController {
     /* ISA IO and Memory space */
     MemoryRegion isa_io;
     MemoryRegion isa_mem;
+    MemoryRegion isa_fw;
 
     /* Windows from OPB to ISA (aliases) */
     MemoryRegion opb_isa_io;