diff --git a/src/boot/efi/util.c b/src/boot/efi/util.c
index 43a11446296..403b78c033c 100644
--- a/src/boot/efi/util.c
+++ b/src/boot/efi/util.c
@@ -570,7 +570,7 @@ static inline void outb(uint16_t port, uint8_t value) {
         asm volatile("outb %0, %1" : : "a"(value), "Nd"(port));
 }
 
-void beep(UINTN beep_count) {
+void beep(unsigned beep_count) {
         enum {
                 PITCH                = 500,
                 BEEP_DURATION_USEC   = 100 * 1000,
diff --git a/src/boot/efi/util.h b/src/boot/efi/util.h
index 5fda06e27a0..d42c23730d3 100644
--- a/src/boot/efi/util.h
+++ b/src/boot/efi/util.h
@@ -191,9 +191,9 @@ void hexdump(const char16_t *prefix, const void *data, size_t size);
         }
 
 #if defined(__i386__) || defined(__x86_64__)
-void beep(UINTN beep_count);
+void beep(unsigned beep_count);
 #else
-static inline void beep(UINTN beep_count) {}
+static inline void beep(unsigned beep_count) {}
 #endif
 
 EFI_STATUS open_volume(EFI_HANDLE device, EFI_FILE **ret_file);