diff --git a/include/cutils/mspace.h b/include/cutils/mspace.h
index 33410c1..e6e4047 100644
--- a/include/cutils/mspace.h
+++ b/include/cutils/mspace.h
@@ -80,6 +80,12 @@
 mspace create_contiguous_mspace_with_name(size_t starting_capacity,
     size_t max_capacity, int locked, const char *name);
 
+/*
+   Identical to create_contiguous_mspace, but uses previously mapped memory.
+*/
+mspace create_contiguous_mspace_with_base(size_t starting_capacity,
+    size_t max_capacity, int locked, void *base);
+
 size_t destroy_contiguous_mspace(mspace msp);
 #endif