diff --git a/include/catch.hpp b/include/catch.hpp
index cb8a19c1..91d392b0 100644
--- a/include/catch.hpp
+++ b/include/catch.hpp
@@ -19,6 +19,9 @@
 
 #ifdef CATCH_CONFIG_MAIN
 #  define CATCH_CONFIG_RUNNER
+#endif
+
+#ifdef CATCH_CONFIG_RUNNER
 #  ifndef CLARA_CONFIG_MAIN
 #    define CLARA_CONFIG_MAIN_NOT_DEFINED
 #    define CLARA_CONFIG_MAIN