diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index abb941530c56..08c461f1142d 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -144,7 +144,7 @@ static int dsm_label_utf16s_to_utf8s(union acpi_object *obj, char *buf)
 	int len;
 
 	len = utf16s_to_utf8s((const wchar_t *)obj->buffer.pointer,
-			      obj->buffer.length,
+			      obj->buffer.length / sizeof(wchar_t),
 			      UTF16_LITTLE_ENDIAN,
 			      buf, PAGE_SIZE - 1);
 	buf[len++] = '\n';