diff --git a/src/operation/iNO/api/NoApi.cpp b/src/operation/iNO/api/NoApi.cpp
index f84f255fd1766be6d74466c67fe9f4c85d9fab6d..49bf3d64126e93a88fe0508434ec3a5cfad58330 100644
--- a/src/operation/iNO/api/NoApi.cpp
+++ b/src/operation/iNO/api/NoApi.cpp
@@ -137,9 +137,26 @@ ieda_feature::NetOptSummary NoApi::outputSummary() {
     clock_timing.hold_wns = eval_data.hold_wns;
     clock_timing.suggest_freq = eval_data.freq;
 
-    ieda_feature::NOClockTimingCmp clock_cmp;
-    memset(&clock_cmp, 0, sizeof(ieda_feature::NOClockTimingCmp));
-    clock_cmp.origin = clock_timing;
+    ieda_feature::NOClockTimingCmp clock_cmp {
+      .clock_name = "",
+      .origin = clock_timing,
+      .opt = {
+        .clock_name = "",
+        .setup_tns = 0,
+        .setup_wns = 0,
+        .hold_tns = 0,
+        .hold_wns = 0,
+        .suggest_freq=0,
+      },
+      .delta = {
+        .clock_name = "",
+        .setup_tns = 0,
+        .setup_wns = 0,
+        .hold_tns = 0,
+        .hold_wns = 0,
+        .suggest_freq=0,
+      },
+    };
     summary_map[clock_name] = clock_cmp;
   }