diff --git a/libguac/Doxyfile b/libguac/Doxyfile
index b8a2290e..0bfde8d4 100644
--- a/libguac/Doxyfile
+++ b/libguac/Doxyfile
@@ -625,7 +625,7 @@ EXCLUDE_PATTERNS       =
 # wildcard * is used, a substring. Examples: ANamespace, AClass,
 # AClass::ANamespace, ANamespace::*Test
 
-EXCLUDE_SYMBOLS        =
+EXCLUDE_SYMBOLS        = __*
 
 # The EXAMPLE_PATH tag can be used to specify one or more files or
 # directories that contain example code fragments that are included (see