diff --git a/src/dirinfo.hpp b/src/dirinfo.hpp
index 8ae2315c..b48e7414 100644
--- a/src/dirinfo.hpp
+++ b/src/dirinfo.hpp
@@ -18,6 +18,7 @@
 
 #pragma once
 
+#include "assert.hpp"
 #include "fh.hpp"
 
 #include "base_types.h"
diff --git a/src/fuse_ftruncate.cpp b/src/fuse_ftruncate.cpp
index 46e02b73..677656fc 100644
--- a/src/fuse_ftruncate.cpp
+++ b/src/fuse_ftruncate.cpp
@@ -55,6 +55,9 @@ FUSE::ftruncate(const fuse_req_ctx_t *ctx_,
                               });
     }
 
+  if(fh == 0)
+    return -ENOENT;
+
   FileInfo *fi = FileInfo::from_fh(fh);
 
   return ::_ftruncate(fi->fd,size_);
diff --git a/src/fuse_futimens.cpp b/src/fuse_futimens.cpp
index 9c94c231..40387dd6 100644
--- a/src/fuse_futimens.cpp
+++ b/src/fuse_futimens.cpp
@@ -57,6 +57,9 @@ FUSE::futimens(const fuse_req_ctx_t  *ctx_,
                               });
     }
 
+  if(fh == 0)
+    return -ENOENT;
+
   FileInfo *fi = FileInfo::from_fh(fh);
 
   return ::_futimens(fi->fd,ts_);