diff --git a/src/ifcgeom_schema_agnostic/Kernel.h b/src/ifcgeom_schema_agnostic/Kernel.h
index 06d4dd079b..abeb159a1a 100644
--- a/src/ifcgeom_schema_agnostic/Kernel.h
+++ b/src/ifcgeom_schema_agnostic/Kernel.h
@@ -11,6 +11,9 @@
 #include <boost/preprocessor/comparison/greater.hpp> 
 #include <boost/preprocessor/selection/min.hpp>
 
+#ifndef SCHEMA_SEQ
+static_assert(false, "A boost preprocessor sequence of schema identifiers is needed for this file to compile.");
+#endif
 
 // @tfk A macro cannot define an include (I think), so here we can't
 // loop over the sequence of schema identifiers, but rather we have
@@ -168,4 +171,4 @@ namespace IfcGeom {
 	};
 }
 
-#endif
\ No newline at end of file
+#endif