diff --git a/src/fuse_create.cpp b/src/fuse_create.cpp
index c1c618dc..185f554d 100644
--- a/src/fuse_create.cpp
+++ b/src/fuse_create.cpp
@@ -282,7 +282,7 @@ namespace FUSE
     if(rv != 0)
       return rv;
 
-    uint64_t x = _(cfg->passthrough,ffi_->flags);
+    const uint64_t x = _(cfg->passthrough,ffi_->flags);
     switch(x)
       {
       case _(PassthroughEnum::ro,O_RDONLY):