diff --git a/mps/src/mpscawl.h b/mps/src/mpscawl.h
new file mode 100644
index 00000000000..88cd2f488df
--- /dev/null
+++ b/mps/src/mpscawl.h
@@ -0,0 +1,14 @@
+/* impl.h.mpscaawl: MEMORY POOL SYSTEM CLASS "AWL"
+ *
+ * $HopeName$
+ * Copyright (C) 1997 The Harlequin Group.  All rights reserved.
+ */
+
+#ifndef mpscawl_h
+#define mpscawl_h
+
+#include "mps.h"
+
+extern mps_class_t mps_class_awl(void);
+
+#endif /* mpscawl_h */