diff --git a/lib/nexrad/archive.py b/lib/nexrad/archive.py
index 60d7ef7..a4ac784 100644
--- a/lib/nexrad/archive.py
+++ b/lib/nexrad/archive.py
@@ -18,6 +18,7 @@ class ArchiveDateError(Exception):
 class ArchiveProductType(enum.Enum):
     DEFAULT = 1
     V03     = 3
+    V04     = 4
 
 class ArchiveProduct():
     __slots__ = 'typeof', 'radar', 'timestamp',
@@ -44,6 +45,8 @@ class ArchiveProduct():
 
         if self.typeof == ArchiveProductType.V03:
             ret += "_V03"
+        elif self.typeof == ArchiveProductType.V04:
+            ret += "_V04"
 
         ret += ".gz"
 
@@ -55,6 +58,8 @@ class ArchiveProduct():
 
         if self.typeof == ArchiveProductType.V03:
             ret += "_V03"
+        elif self.typeof == ArchiveProductType.V04:
+            ret += "_V04"
 
         ret += ".gz"