diff --git a/src/include/ipxe/efi/efi_driver.h b/src/include/ipxe/efi/efi_driver.h
index 06331647..e5872ced 100644
--- a/src/include/ipxe/efi/efi_driver.h
+++ b/src/include/ipxe/efi/efi_driver.h
@@ -18,7 +18,7 @@ struct efi_driver {
 	/** Name */
 	const char *name;
 	/** EFI name */
-	CHAR16 *wname;
+	CHAR16 wname[32];
 	/** EFI driver binding protocol */
 	EFI_DRIVER_BINDING_PROTOCOL driver;
 	/** EFI component name protocol */