diff --git a/cmake/stub_CMakeLists.txt.in b/cmake/stub_CMakeLists.txt.in
index c768239006..e227e820d6 100644
--- a/cmake/stub_CMakeLists.txt.in
+++ b/cmake/stub_CMakeLists.txt.in
@@ -1,12 +1,12 @@
 
 # stub
-#ExternalProject_Add(stub
-#        GIT_REPOSITORY https://github.com/coolxv/cpp-stub.git
-#        GIT_SUBMODULES "src"
-#        SOURCE_DIR "${CMAKE_CONTRIB_DIR}/cpp-stub"
-#        BINARY_DIR "${CMAKE_CONTRIB_DIR}/cpp-stub/src"
-#        CONFIGURE_COMMAND ""
-#        BUILD_COMMAND ""
-#        INSTALL_COMMAND ""
-#        TEST_COMMAND ""
-#)
+ExternalProject_Add(stub
+        GIT_REPOSITORY https://github.com/coolxv/cpp-stub.git
+        GIT_SUBMODULES "src"
+        SOURCE_DIR "${CMAKE_CONTRIB_DIR}/cpp-stub"
+        BINARY_DIR "${CMAKE_CONTRIB_DIR}/cpp-stub/src"
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ""
+        INSTALL_COMMAND ""
+        TEST_COMMAND ""
+)