diff --git a/parser.go b/parser.go
index 1a9e034..63742db 100644
--- a/parser.go
+++ b/parser.go
@@ -96,7 +96,7 @@ loop:
 		case '_':
 		default:
 			// variable name should match [A-Za-z0-9_.]
-			if unicode.IsLetter(rchar) || unicode.IsNumber(rchar) || rchar == '.' || rchar == '-' {
+			if unicode.IsLetter(rchar) || unicode.IsNumber(rchar) || rchar == '.' || rchar == '-' || rchar == '/' {
 				continue
 			}