diff --git a/include/cutils/mspace.h b/include/cutils/mspace.h
index e6e4047..93fe48e 100644
--- a/include/cutils/mspace.h
+++ b/include/cutils/mspace.h
@@ -87,6 +87,11 @@
     size_t max_capacity, int locked, void *base);
 
 size_t destroy_contiguous_mspace(mspace msp);
+
+/*
+   Returns the position of the "break" within the given mspace.
+*/
+void *contiguous_mspace_sbrk0(mspace msp);
 #endif
 
 /*