diff --git a/simplecpp.cpp b/simplecpp.cpp
index 2adfa898..67dff2c4 100755
--- a/simplecpp.cpp
+++ b/simplecpp.cpp
@@ -2521,7 +2521,7 @@ static std::string openHeader(std::ifstream &f, const simplecpp::DUI &dui, const
 static void simplifyHasInclude(simplecpp::TokenList &expr, const simplecpp::DUI &dui)
 {
     for (simplecpp::Token *tok = expr.front(); tok; tok = tok->next) {
-        if (tok->str() != "__has_include")
+        if (tok->str() != HAS_INCLUDE)
             continue;
         simplecpp::Token *tok1 = tok->next;
         if (!tok1) {