diff --git a/src/parser.h b/src/parser.h
index 28d8e7c3..1ab93df1 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -231,7 +231,7 @@ struct Parser {
             return 0;
         }
 
-        if(kTokenKwMap.count(name)){
+        if(kTokenKwMap.contains(name)){
             if(name == "not"){
                 if(strncmp(curr_char, " in", 3) == 0){
                     curr_char += 3;