diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bed793..e83a858 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,7 +98,7 @@
 # the swiftdoc and swiftmodule to be in the top level.
 # So for now, make a copy so we don't have to do a coordinated commit across
 # all the swift projects to change this assumption.
-add_custom_target(TARGET
+add_custom_command(TARGET
                     XCTest
                   POST_BUILD
                   COMMAND