Tag aliases feature
diff --git a/include/catch.hpp b/include/catch.hpp
index 447e3b2..b05c485 100644
--- a/include/catch.hpp
+++ b/include/catch.hpp
@@ -32,6 +32,7 @@
 #include "internal/catch_approx.hpp"
 #include "internal/catch_matchers.hpp"
 #include "internal/catch_compiler_capabilities.h"
+#include "internal/catch_interfaces_tag_alias_registry.h"
 
 // These files are included here so the single_include script doesn't put them
 // in the conditionally compiled sections