diff --git a/src/fuse_create.cpp b/src/fuse_create.cpp
index bb20f9ec..d77e0142 100644
--- a/src/fuse_create.cpp
+++ b/src/fuse_create.cpp
@@ -287,7 +287,7 @@ namespace FUSE
     if(rv != 0)
       return rv;
 
-    uint64_t x = ((+cfg->passthrough << 32));
+    uint64_t x = ((((uint64_t)+cfg->passthrough) << 32));
     switch(+cfg->passthrough)
       {
       case PassthroughEnum::off: