diff --git a/build-support/macros-and-definitions.cmake b/build-support/macros-and-definitions.cmake
index 3fd1c923d..34804ec0d 100644
--- a/build-support/macros-and-definitions.cmake
+++ b/build-support/macros-and-definitions.cmake
@@ -1379,9 +1379,10 @@ macro(build_example)
   # Filter examples out if they don't contain one of the filtered in modules
   set(filtered_in ON)
   if(NS3_FILTER_MODULE_EXAMPLES_AND_TESTS)
-    foreach(required_module EXAMPLE_LIBRARIES_TO_LINK)
-      if(NOT (${required_module} IN_LIST NS3_FILTER_MODULE_EXAMPLES_AND_TESTS))
-        set(filtered_in OFF)
+    set(filtered_in OFF)
+    foreach(required_module ${EXAMPLE_LIBRARIES_TO_LINK})
+      if(${required_module} IN_LIST NS3_FILTER_MODULE_EXAMPLES_AND_TESTS)
+        set(filtered_in ON)
       endif()
     endforeach()
   endif()