diff --git a/parser/parser.mly b/parser/parser.mly
index 2f2afc9..6cf6930 100644
--- a/parser/parser.mly
+++ b/parser/parser.mly
@@ -107,7 +107,7 @@ where_clause :
   | WHERE search_condition { }
 
 search_condition:
-  | IDENT EQUALS_OPERATOR IDENT {}
+  | boolean_value_expression {}
 
 boolean_value_expression:
   | boolean_term {}