diff --git a/crlcore/CMakeLists.txt b/crlcore/CMakeLists.txt
index 0e6e3515..79f93508 100644
--- a/crlcore/CMakeLists.txt
+++ b/crlcore/CMakeLists.txt
@@ -42,4 +42,6 @@
  add_subdirectory(src)
  add_subdirectory(python)
  add_subdirectory(cmake_modules)
- add_subdirectory(doc)
+ if (BUILD_DOC)
+   add_subdirectory(doc)
+ endif()
diff --git a/hurricane/CMakeLists.txt b/hurricane/CMakeLists.txt
index ab937cc7..5c0a31e1 100644
--- a/hurricane/CMakeLists.txt
+++ b/hurricane/CMakeLists.txt
@@ -34,7 +34,9 @@
  
  add_subdirectory(src)
  add_subdirectory(cmake_modules)
- add_subdirectory(doc)
+ if (BUILD_DOC)
+   add_subdirectory(doc)
+ endif()
 #add_subdirectory(tests)
  
 #enable_testing()
diff --git a/oroshi/CMakeLists.txt b/oroshi/CMakeLists.txt
index c857cdc4..a41772b0 100644
--- a/oroshi/CMakeLists.txt
+++ b/oroshi/CMakeLists.txt
@@ -29,4 +29,6 @@
  add_subdirectory(python)
 #add_subdirectory(etc)
 #add_subdirectory(cmake_modules)
- add_subdirectory(doc)
+ if (BUILD_DOC)
+   add_subdirectory(doc)
+ endif()
diff --git a/unicorn/CMakeLists.txt b/unicorn/CMakeLists.txt
index ed1074d2..8509e672 100644
--- a/unicorn/CMakeLists.txt
+++ b/unicorn/CMakeLists.txt
@@ -54,4 +54,6 @@
  add_subdirectory(src)
  add_subdirectory(python)
  add_subdirectory(cmake_modules)
- add_subdirectory(doc)
+ if (BUILD_DOC)
+   add_subdirectory(doc)
+ endif()