diff --git a/src/calf/modules_filter.h b/src/calf/modules_filter.h
index fb5cdf85f..e1a54292a 100644
--- a/src/calf/modules_filter.h
+++ b/src/calf/modules_filter.h
@@ -261,7 +261,8 @@ public frequency_response_line_graph
                         ins[0][i] * *params[Metadata::param_level_in],
                         (ins[ins[1]?1:0][i]) * *params[Metadata::param_level_in],
                         outs[0][i],
-                        (outs[outs[1]?1:0][i]};
+                        (outs[outs[1]?1:0][i])
+                    };
                     meters.process(values);
                 }
                 offset += numnow;