diff --git a/gedgo/gedcom_parser.py b/gedgo/gedcom_parser.py
index 2e4506d..4d051ea 100644
--- a/gedgo/gedcom_parser.py
+++ b/gedgo/gedcom_parser.py
@@ -12,7 +12,7 @@ class GedcomParser(object):
     line_re = re.compile(
         '^(\d{1,2})' +          # Level
         '(?: @([A-Z\d]+)@)?' +  # Pointer, optional
-        ' _?([A-Z\d]{3,})' +    # Tag
+        ' _?([A-Z\d_]{3,})' +    # Tag
         '(?: (.+))?$'           # Value, optional
     )
 
diff --git a/gedgo/static/test/test.ged b/gedgo/static/test/test.ged
index 8a9ebaf..56277be 100644
--- a/gedgo/static/test/test.ged
+++ b/gedgo/static/test/test.ged
@@ -3,6 +3,7 @@
 2 VERS V9.0
 1 DEST Test
 1 DATE 21 JUN 2012
+1 _PROJECT_GUID 54392856109823651098237651F
 1 TITL Test Gedcom
 1 FILE Test
 1 GEDC