--- a/madt/madt.c
+++ b/madt/madt.c
@@ -46,7 +46,7 @@
 {
 	size_t retval;
 
-	if (verbose) printf("reading %d byte entry header\n", sizeof(acpi_table_entry_header));
+	if (verbose) printf("reading %ld byte entry header\n", sizeof(acpi_table_entry_header));
 	retval = fread((void *)entry_header, sizeof(acpi_table_entry_header), 1, stdin);
 	return retval;
 }
@@ -64,7 +64,7 @@
 
 	bytes_read = csum = 0;
 
-	if (verbose) printf("reading %d madt header\n", sizeof(struct acpi_table_madt));
+	if (verbose) printf("reading %ld madt header\n", sizeof(struct acpi_table_madt));
 
 	retval = fread((void *)buffer, sizeof(struct acpi_table_madt), 1, stdin);
 	if (retval != 1) {