diff --git a/fuzzers/FRET/src/systemstate/stg.rs b/fuzzers/FRET/src/systemstate/stg.rs
index d4e86611dd..ced853e783 100644
--- a/fuzzers/FRET/src/systemstate/stg.rs
+++ b/fuzzers/FRET/src/systemstate/stg.rs
@@ -144,8 +144,17 @@ pub struct StgFeedback
     name: String,
     last_trace: Option<Vec<NodeIndex>>,
 }
+#[cfg(feature = "feed_stg")]
+const INTEREST_EDGE : bool = false;
+#[cfg(feature = "feed_stg")]
+const INTEREST_NODE : bool = false;
+#[cfg(feature = "feed_stg")]
+const INTEREST_AGGREGATE : bool = false;
+#[cfg(not(feature = "feed_stg"))]
 const INTEREST_EDGE : bool = true;
+#[cfg(not(feature = "feed_stg"))]
 const INTEREST_NODE : bool = true;
+#[cfg(not(feature = "feed_stg"))]
 const INTEREST_AGGREGATE : bool = true;
 fn set_observer_map(trace : &Vec<EdgeIndex>) {
     unsafe {