diff --git a/src/parser.cpp b/src/parser.cpp
index 818108ae0e..e608f318b1 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -1636,8 +1636,9 @@ namespace Sass {
         }
         ex->is_interpolant(true);
         schema->append(ex);
-        // ToDo: no error check here?
-        lex < exactly < rbrace > >();
+        if (!lex < exactly < rbrace > >()) {
+          css_error("Invalid CSS", " after ", ": expected \"}\", was ");
+        }
       }
       // lex some string constants or other valid token
       // Note: [-+] chars are left over from i.e. `#{3}+3`