diff --git a/hypervisor/release/uart16550.c b/hypervisor/release/uart16550.c
index 2f47c228a..d08bc05ef 100644
--- a/hypervisor/release/uart16550.c
+++ b/hypervisor/release/uart16550.c
@@ -11,6 +11,6 @@ void uart16550_init(__unused bool early_boot) {}
 
 bool is_pci_dbg_uart(__unused union pci_bdf bdf_value) { return false; }
 
-bool get_pio_dbg_uart_cfg(__unused uint64_t *pio_address, __unused uint64_t *nbytes) {
+bool get_pio_dbg_uart_cfg(__unused uint16_t *pio_address, __unused uint32_t *nbytes) {
 	return false;
 }