diff --git a/Doxyfile.gsm.in b/Doxyfile.gsm.in
index ed4ff47..1dae2b5 100644
--- a/Doxyfile.gsm.in
+++ b/Doxyfile.gsm.in
@@ -654,7 +654,7 @@
 # against the file with absolute path, so to exclude all test directories
 # for example use the pattern */test/*
 
-EXCLUDE_PATTERNS       =
+EXCLUDE_PATTERNS       = */include/osmocom/gsm/protocol/*
 
 # The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
 # (namespaces, classes, functions, etc.) that should be excluded from the