diff --git a/jc/parsers/foo_s.py b/jc/parsers/foo_s.py
index 4b79dd3f..2143b23e 100644
--- a/jc/parsers/foo_s.py
+++ b/jc/parsers/foo_s.py
@@ -97,12 +97,14 @@ def parse(data, raw=False, quiet=False, ignore_exceptions=False):
 
         Iterator object
     """
-    if not quiet:
-        jc.utils.compatibility(__name__, info.compatible)
+    if not quiet: jc.utils.compatibility(__name__, info.compatible)
+    if not hasattr(data, '__iter__') or isinstance(data, (str, bytes)):
+        raise TypeError("Input data must be a non-string iterable object.")
 
     for line in data:
+        output_line = {}
         try:
-            output_line = {}
+            if not isinstance(line, str): raise TypeError("Input line must be a 'str' object.")
 
             #
             # parse the input here