diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c
index e23399c..001622e 100644
--- a/drivers/firmware/memmap.c
+++ b/drivers/firmware/memmap.c
@@ -153,12 +153,14 @@
 
 static ssize_t start_show(struct firmware_map_entry *entry, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "0x%llx\n", entry->start);
+	return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+		(unsigned long long)entry->start);
 }
 
 static ssize_t end_show(struct firmware_map_entry *entry, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "0x%llx\n", entry->end);
+	return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+		(unsigned long long)entry->end);
 }
 
 static ssize_t type_show(struct firmware_map_entry *entry, char *buf)