diff --git a/dts/bindings/vendor-prefixes.txt b/dts/bindings/vendor-prefixes.txt
index c68773540b..adb976f085 100644
--- a/dts/bindings/vendor-prefixes.txt
+++ b/dts/bindings/vendor-prefixes.txt
@@ -58,6 +58,7 @@ analogix	Analogix Semiconductor, Inc.
 andestech	Andes Technology Corporation
 anvo	Anvo-Systems Dresden GmbH
 aosong	Guangzhou Aosong Electronic Co., Ltd.
+ap	Angst+Pfister
 apa	Apa Electronic Co., Ltd
 apm	Applied Micro Circuits Corporation (APM)
 apple	Apple Inc.