diff --git a/afl/src/lib.rs b/afl/src/lib.rs
index 44e70c146b..719c15dff8 100644
--- a/afl/src/lib.rs
+++ b/afl/src/lib.rs
@@ -27,7 +27,7 @@ pub mod tuples;
 pub mod utils;
 
 use alloc::string::String;
-use core::fmt;
+use core::{fmt, marker::PhantomData};
 use corpus::Corpus;
 use events::EventManager;
 use executors::{Executor, HasObservers};
@@ -36,10 +36,10 @@ use inputs::Input;
 use observers::ObserversTuple;
 use stages::StagesTuple;
 use state::{HasCorpus, State};
-use std::marker::PhantomData;
+use utils::{current_milliseconds, Rand};
+
 #[cfg(feature = "std")]
 use std::{env::VarError, io, num::ParseIntError, string::FromUtf8Error};
-use utils::{current_milliseconds, Rand};
 
 /// The main fuzzer trait.
 pub trait Fuzzer<C, E, EM, FT, ST, I, OT, R>
diff --git a/afl/src/mutators/mutations.rs b/afl/src/mutators/mutations.rs
index 7c23e9824e..fcc85d109d 100644
--- a/afl/src/mutators/mutations.rs
+++ b/afl/src/mutators/mutations.rs
@@ -6,9 +6,13 @@ use crate::{
     AflError,
 };
 
-use std::fs::File;
+use alloc::{borrow::ToOwned, vec::Vec};
+
 #[cfg(feature = "std")]
-use std::io::{BufRead, BufReader};
+use std::{
+    fs::File,
+    std::io::{BufRead, BufReader},
+};
 
 const ARITH_MAX: u64 = 35;
 
@@ -816,6 +820,7 @@ pub fn add_token_to_dictionary(dict: &mut Vec<Vec<u8>>, token: &Vec<u8>) -> u32
 }
 
 /// Read a dictionary file and return the number of entries read
+#[cfg(feature = "std")]
 pub fn read_dict_file(f: &str, dict: &mut Vec<Vec<u8>>) -> Result<u32, AflError> {
     let mut entries = 0;
 
@@ -878,10 +883,13 @@ pub fn read_dict_file(f: &str, dict: &mut Vec<Vec<u8>>) -> Result<u32, AflError>
 
 #[cfg(test)]
 mod tests {
+    #[cfg(feature = "std")]
     use std::fs;
 
+    #[cfg(feature = "std")]
     use crate::mutators::read_dict_file;
 
+    #[cfg(feature = "std")]
     #[test]
     fn test_read_dict() {
         let _ = fs::remove_file("test.dict");