diff --git a/crates/ra_syntax/src/grammar/type_params.rs b/crates/ra_syntax/src/grammar/type_params.rs
index f4c98675c6c7..863f8e00c6d9 100644
--- a/crates/ra_syntax/src/grammar/type_params.rs
+++ b/crates/ra_syntax/src/grammar/type_params.rs
@@ -108,7 +108,7 @@ pub(super) fn opt_where_clause(p: &mut Parser) {
             break;
         }
         where_predicate(p);
-        if p.current() != L_CURLY && p.current() != SEMI {
+        if p.current() != L_CURLY && p.current() != SEMI && p.current() != EQ {
             p.expect(COMMA);
         }
     }