diff --git a/src/fuse_open.cpp b/src/fuse_open.cpp
index d96c1026..611638c5 100644
--- a/src/fuse_open.cpp
+++ b/src/fuse_open.cpp
@@ -262,6 +262,7 @@ namespace l
 }
 
 constexpr
+const
 uint64_t
 combine(PassthroughEnum e,
         uint64_t        m)