diff --git a/ext/ragel/base_lexer.rl b/ext/ragel/base_lexer.rl
index 17ee5b4..d05fc09 100644
--- a/ext/ragel/base_lexer.rl
+++ b/ext/ragel/base_lexer.rl
@@ -48,7 +48,7 @@
 
     newline    = '\r\n' | '\n' | '\r';
     whitespace = [ \t];
-    ident_char = [a-zA-Z0-9\-_];
+    ident_char = [a-zA-Z0-9\-_\.];
     identifier = ident_char+;
 
     whitespace_or_newline = whitespace | newline;