--- SpecCheck.py
+++ SpecCheck.py
@@ -90,7 +90,7 @@
         elif wantmore:
             tmp += ' ' + tok
             wantmore = 0
-        elif tok[0] in ('=', '<', '>'):
+        elif len(tok) and tok[0] in ('=', '<', '>'):
             tmp += ' ' + tok
             wantmore = 1
         else: