diff --git a/pyfpdb/Tables.py b/pyfpdb/Tables.py
index 6c131d91..a0f367da 100644
--- a/pyfpdb/Tables.py
+++ b/pyfpdb/Tables.py
@@ -61,7 +61,7 @@ def discover(c):
     elif os.name == 'nt':
         tables = discover_nt(c)
 	return tables
-    elif ox.name == 'mac':
+    elif os.name == 'mac':
         tables = discover_mac(c)
 	return tables
     else: tables = {}