diff --git a/util/ExpressionParser.rl b/util/ExpressionParser.rl
index ad201fec..02761b32 100644
--- a/util/ExpressionParser.rl
+++ b/util/ExpressionParser.rl
@@ -152,7 +152,6 @@ bool HS_CDECL readExpression(const std::string &input, std::string &expr,
     UNUSED const char *eof = pe;
     UNUSED const char *ts = p, *te = p;
     int cs;
-    //UNUSED int act;
 
     assert(p);
     assert(pe);