Index: lib/fuzzer/FuzzerIOPosix.cpp
===================================================================
--- lib/fuzzer/FuzzerIOPosix.cpp
+++ lib/fuzzer/FuzzerIOPosix.cpp
@@ -32,6 +32,13 @@
   return S_ISREG(St.st_mode);
 }
 
+static bool IsDirectory(const std::string &Path) {
+  struct stat St;
+  if (stat(Path.c_str(), &St))
+    return false;
+  return S_ISDIR(St.st_mode);
+}
+
 size_t FileSize(const std::string &Path) {
   struct stat St;
   if (stat(Path.c_str(), &St))
@@ -52,9 +59,12 @@
   }
   while (auto E = readdir(D)) {
     std::string Path = DirPlusFile(Dir, E->d_name);
-    if (E->d_type == DT_REG || E->d_type == DT_LNK)
+    if (E->d_type == DT_REG || E->d_type == DT_LNK ||
+        (E->d_type == DT_UNKNOWN && IsFile(Path)))
       V->push_back(Path);
-    else if (E->d_type == DT_DIR && *E->d_name != '.')
+    else if ((E->d_type == DT_DIR ||
+             (E->d_type == DT_UNKNOWN && IsDirectory(Path))) &&
+             *E->d_name != '.')
       ListFilesInDirRecursive(Path, Epoch, V, false);
   }
   closedir(D);