diff --git a/python/obitools3/parsers/header.pyx b/python/obitools3/parsers/header.pyx
index 0b87dab..5cd7e82 100644
--- a/python/obitools3/parsers/header.pyx
+++ b/python/obitools3/parsers/header.pyx
@@ -29,6 +29,8 @@ __re_dict__     = re.compile("""^\{\ *
                                         '[^']*'
                                        )
                                     )*\ *\}$""", re.VERBOSE)
+
+
 cdef object __etag__(str x):
     if __re_int__.match(x):
         v=int(x)
@@ -36,6 +38,10 @@ cdef object __etag__(str x):
         v=float(x)
     elif __re_str__.match(x):
         v=x[1:-1]
+    elif x=='False':
+        v=False
+    elif x=='True':
+        v=True
     elif __re_dict__.match(x):
         v=eval(x)
     else: