diff --git a/llvm/lib/Fuzzer/FuzzerIO.cpp b/llvm/lib/Fuzzer/FuzzerIO.cpp
index 043fad3..cc65876 100644
--- a/llvm/lib/Fuzzer/FuzzerIO.cpp
+++ b/llvm/lib/Fuzzer/FuzzerIO.cpp
@@ -32,7 +32,7 @@
   std::vector<std::string> V;
   if (Epoch) {
     auto E = GetEpoch(Dir);
-    if (*Epoch >= E) return V;
+    if (E && *Epoch >= E) return V;
     *Epoch = E;
   }
   DIR *D = opendir(Dir.c_str());