diff --git a/libafl/src/inputs/generalized.rs b/libafl/src/inputs/generalized.rs
index 60dca3e819..471cd61e8e 100644
--- a/libafl/src/inputs/generalized.rs
+++ b/libafl/src/inputs/generalized.rs
@@ -47,7 +47,10 @@ impl Input for GeneralizedInput {
     /// An hook executed before being added to the corpus
     fn wrapped_as_testcase(&mut self) {
         // remove generalized for inputs generated with bit-level mutations
-        if !self.grimoire_mutated {
+        // and fix bytes for the ones generated by grimoire
+        if self.grimoire_mutated {
+            self.bytes = self.generalized_to_bytes();
+        } else {
             self.generalized = None;
         }
         // restore to allow bit-level mutations