diff --git a/src/ISO8601.cpp b/src/ISO8601.cpp
index 3dd163e0b..84a59b106 100644
--- a/src/ISO8601.cpp
+++ b/src/ISO8601.cpp
@@ -960,19 +960,6 @@ void ISO8601d::resolve ()
   _date = utc ? timegm (&t) : mktime (&t);
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ISO8601d::isEpoch (const std::string& input)
-{
-  if (Lexer::isAllDigits (input) &&
-      input.length () <= 10 )
-  {
-    _date = (time_t) strtol (input.c_str (), NULL, 10);
-    return true;
-  }
-
-  return false;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 ISO8601p::ISO8601p ()
 {
diff --git a/src/ISO8601.h b/src/ISO8601.h
index bc995243c..32935866d 100644
--- a/src/ISO8601.h
+++ b/src/ISO8601.h
@@ -119,7 +119,6 @@ private:
   bool parse_time_off_ext  (Nibbler&);
   bool validate ();
   void resolve ();
-  bool isEpoch (const std::string&);
 
 public:
   int _year;