diff --git a/include/ircd/cl/data.h b/include/ircd/cl/data.h
index 63ad9e59e..614201fe5 100644
--- a/include/ircd/cl/data.h
+++ b/include/ircd/cl/data.h
@@ -22,6 +22,7 @@ struct ircd::cl::data
   public:
 	explicit operator bool() const;
 
+	void *master() const;
 	uint flags() const;
 	size_t size() const;
 	off_t offset() const;
diff --git a/ircd/cl.cc b/ircd/cl.cc
index 05643e3aa..5a1266352 100644
--- a/ircd/cl.cc
+++ b/ircd/cl.cc
@@ -2166,6 +2166,17 @@ const
 	return info<uint>(clGetMemObjectInfo, cl_mem(mutable_cast(handle)), CL_MEM_FLAGS, buf);
 }
 
+void *
+ircd::cl::data::master()
+const
+{
+	assert(handle);
+
+	char buf[sizeof(void *)] {0};
+	constexpr auto qtype(CL_MEM_ASSOCIATED_MEMOBJECT);
+	return info<cl_mem>(clGetMemObjectInfo, cl_mem(mutable_cast(handle)), qtype, buf);
+}
+
 //
 // cl::work (event)
 //