diff --git a/unsupported/doc/CMakeLists.txt b/unsupported/doc/CMakeLists.txt
index efdf94f80..2cff2510f 100644
--- a/unsupported/doc/CMakeLists.txt
+++ b/unsupported/doc/CMakeLists.txt
@@ -1,3 +1,6 @@
+
+set_directory_properties(PROPERTIES EXCLUDE_FROM_ALL TRUE)
+
 if(NOT MSVC)
   add_subdirectory(examples)
 endif(NOT MSVC)