diff --git a/fuzzers/FRET/src/fuzzer.rs b/fuzzers/FRET/src/fuzzer.rs
index f9356d22fa..00bc36de2c 100644
--- a/fuzzers/FRET/src/fuzzer.rs
+++ b/fuzzers/FRET/src/fuzzer.rs
@@ -510,7 +510,13 @@ let run_client = |state: Option<_>, mut mgr, _core_id| {
             //     } else {
             //         // fs::read(s).expect("Input file for DO_SHOWMAP can not be read")
             //     });
-            let show_input = MultipartInput::from_file(input.as_os_str()).expect("Error reading input file");
+            let show_input = match MultipartInput::from_file(input.as_os_str()) {
+                Ok(x) => x,
+                Err(_) => {
+                    println!("Interpreting input file as raw input");
+                    MultipartInput::from([("interrupts",BytesInput::new([0; MAX_NUM_INTERRUPT].to_vec())),("bytes",BytesInput::new(input.as_os_str().as_encoded_bytes().to_vec()))])
+                }
+            };
             fuzzer.evaluate_input(&mut state, &mut executor, &mut mgr, show_input)
                 .unwrap();
             do_dump_times!(state, &cli, "");