diff --git a/servers/vm/rs.c b/servers/vm/rs.c
index e41e80d17..5fef8c447 100644
--- a/servers/vm/rs.c
+++ b/servers/vm/rs.c
@@ -180,8 +180,20 @@ int do_rs_memctl(message *m_ptr)
 	switch(req)
 	{
 	case VM_RS_MEM_PIN:
+
+		/* Do not perform VM_RS_MEM_PIN yet - it costs the full
+		 * size of the RS stack (64MB by default) in memory,
+		 * and it's needed for functionality that isn't complete /
+		 * merged in current Minix (surviving VM crashes).
+		 */
+
+#if 0
 		r = map_pin_memory(vmp);
 		return r;
+#else
+		return OK;
+#endif
+
 	case VM_RS_MEM_MAKE_VM:
 		r = rs_memctl_make_vm_instance(vmp);
 		return r;