diff --git a/fuzzers/FRET/src/systemstate/feedbacks.rs b/fuzzers/FRET/src/systemstate/feedbacks.rs
index 5abc2e1ddb..4fca509661 100644
--- a/fuzzers/FRET/src/systemstate/feedbacks.rs
+++ b/fuzzers/FRET/src/systemstate/feedbacks.rs
@@ -293,16 +293,23 @@ where
         EM: EventFirer<State = S>,
         OT: ObserversTuple<S>
     {
-        let observer = observers.match_name::<QemuSystemStateObserver<S::Input>>("systemstate")
-            .expect("QemuSystemStateObserver not found");
-        let is_err = (!observer.success || observer.do_report);
-        if let Some(m) = self.max_reports {
-            if m <= 0 {return Ok(false);}
-            if is_err {
-                self.max_reports = Some(m-1);
+        #[cfg(feature = "trace_stg")]
+        {
+            let observer = observers.match_name::<QemuSystemStateObserver<S::Input>>("systemstate")
+                .expect("QemuSystemStateObserver not found");
+            let is_err = (!observer.success || observer.do_report);
+            if let Some(m) = self.max_reports {
+                if m <= 0 {return Ok(false);}
+                if is_err {
+                    self.max_reports = Some(m-1);
+                }
             }
+            return Ok(self.dump_case&&is_err);
+        }
+        #[cfg(not(feature = "trace_stg"))]
+        {
+            return Ok(false);
         }
-        Ok(self.dump_case&&is_err)
     }
     /// Append to the testcase the generated metadata in case of a new corpus item
     #[inline]