diff --git a/afl/src/engines/mod.rs b/afl/src/engines/mod.rs
index 138b87700f..fc0d94bb32 100644
--- a/afl/src/engines/mod.rs
+++ b/afl/src/engines/mod.rs
@@ -3,7 +3,10 @@
 use core::fmt::Debug;
 use core::marker::PhantomData;
 use serde::{Deserialize, Serialize};
-use std::{fs, path::Path};
+use std::{
+    fs,
+    path::{Path, PathBuf},
+};
 
 use crate::corpus::{Corpus, Testcase};
 use crate::events::EventManager;
@@ -83,7 +86,7 @@ where
 
             if attr.is_file() {
                 println!("Load file {:?}", &path);
-                let bytes = std::fs::read(path)?;
+                let bytes = std::fs::read(&path)?;
                 let input = BytesInput::new(bytes);
                 let fitness = self.evaluate_input(&input, engine.executor_mut())?;
                 if self.add_if_interesting(corpus, input, fitness)?.is_none() {
@@ -103,7 +106,7 @@ where
         generator: &mut G,
         engine: &mut Engine<E, OT, ET, BytesInput>,
         manager: &mut EM,
-        in_dir: Vec<String>,
+        in_dirs: &[PathBuf],
     ) -> Result<(), AflError>
     where
         G: Generator<BytesInput, R>,
@@ -112,12 +115,12 @@ where
         ET: ExecutorsTuple<BytesInput>,
         EM: EventManager<C, E, OT, FT, BytesInput, R>,
     {
-        for directory in &in_dir {
-            self.load_from_directory(corpus, generator, engine, manager, Path::new(directory))?;
+        for in_dir in in_dirs {
+            self.load_from_directory(corpus, generator, engine, manager, in_dir)?;
         }
         manager.log(
             0,
-            format!("Loaded {} initial testcases", in_dir.len()), // get corpus count
+            format!("Loaded {} initial testcases", in_dirs.len()), // get corpus count
         )?;
         manager.process(self, corpus)?;
         Ok(())
diff --git a/fuzzers/libfuzzer/src/lib.rs b/fuzzers/libfuzzer/src/lib.rs
index dd56dc5c24..25767a5c48 100644
--- a/fuzzers/libfuzzer/src/lib.rs
+++ b/fuzzers/libfuzzer/src/lib.rs
@@ -6,6 +6,7 @@ extern crate alloc;
 
 use clap::{App, Arg};
 use std::env;
+use std::path::PathBuf;
 
 use afl::corpus::InMemoryCorpus;
 use afl::engines::Engine;
@@ -87,15 +88,15 @@ pub extern "C" fn afl_libfuzzer_main() {
         env::current_dir().unwrap().to_string_lossy().to_string()
     };
 
-    let mut dictionary: Option<Vec<String>> = None;
+    let mut dictionary: Option<Vec<PathBuf>> = None;
 
     if matches.is_present("dictionary") {
-        dictionary = Some(values_t!(matches, "dictionary", String).unwrap_or_else(|e| e.exit()));
+        dictionary = Some(values_t!(matches, "dictionary", PathBuf).unwrap_or_else(|e| e.exit()));
     }
 
-    let mut input: Option<Vec<String>> = None;
+    let mut input: Option<Vec<PathBuf>> = None;
     if matches.is_present("workdir") {
-        input = Some(values_t!(matches, "workdir", String).unwrap_or_else(|e| e.exit()));
+        input = Some(values_t!(matches, "workdir", PathBuf).unwrap_or_else(|e| e.exit()));
     }
 
     if dictionary != None || input != None {
@@ -104,18 +105,24 @@ pub extern "C" fn afl_libfuzzer_main() {
 
     // debug prints
 
-    println!("workdir: {}", workdir);
+    println!("workdir: {:?}", workdir);
 
-    if dictionary != None {
-        for file in dictionary.unwrap() {
-            println!("dic: {}", file);
+    match dictionary {
+        Some(ref x) => {
+            for file in x {
+                println!("dic: {:?}", file);
+            }
         }
+        None => (),
     }
 
-    if input != None {
-        for indir in input.clone().unwrap() {
-            println!("in: {}", indir);
+    match input {
+        Some(ref x) => {
+            for indir in x {
+                println!("in: {:?}", indir);
+            }
         }
+        None => (),
     }
 
     // original code
@@ -149,18 +156,11 @@ pub extern "C" fn afl_libfuzzer_main() {
     //        }
     //    }
 
-    if input != None {
-        state
-            .load_initial_inputs(
-                &mut corpus,
-                &mut generator,
-                &mut engine,
-                &mut mgr,
-                input.unwrap(),
-            )
-            .expect("Failed to load initial corpus");
-    } else {
-        state
+    match input {
+        Some(x) => state
+            .load_initial_inputs(&mut corpus, &mut generator, &mut engine, &mut mgr, &x)
+            .expect("Failed to load initial corpus"),
+        None => state
             .generate_initial_inputs(
                 &mut rand,
                 &mut corpus,
@@ -169,7 +169,7 @@ pub extern "C" fn afl_libfuzzer_main() {
                 &mut mgr,
                 4,
             )
-            .expect("Failed to load initial inputs");
+            .expect("Failed to load initial inputs"),
     }
 
     let mut mutator = HavocBytesMutator::new_default();