diff --git a/m-core.h b/m-core.h
index d2e1f527..3604df29 100644
--- a/m-core.h
+++ b/m-core.h
@@ -1046,6 +1046,7 @@ m_core_hash (const void *str, size_t length)
 //       M_MEMORY_FREE(type, ptr, n)
 // alignement==0 ==> default alignement
 // What about global state for memory allocator?
+// Shall support effectively fixed size allocator.
 // What about oplist? Can open up ALIGN & ALLOC_STATE opertors, and is
 // more flexible.
 #ifndef M_MEMORY_ALLOC