diff --git a/afl/src/engines/mod.rs b/afl/src/engines/mod.rs
index 0de23d186d..9457cd2ed5 100644
--- a/afl/src/engines/mod.rs
+++ b/afl/src/engines/mod.rs
@@ -385,10 +385,13 @@ mod tests {
 
 
     use alloc::boxed::Box;
+
+    #[cfg(feature = "std")]
     use std::io::stderr;
 
     use crate::corpus::{Corpus, InMemoryCorpus, Testcase};
     use crate::engines::{Engine, StdEngine, StdState};
+    #[cfg(feature = "std")]
     use crate::events::LoggerEventManager;
     use crate::executors::inmemory::InMemoryExecutor;
     use crate::executors::{Executor, ExitKind};
@@ -401,6 +404,7 @@ mod tests {
         ExitKind::Ok
     }
 
+    #[cfg(feature = "std")]
     #[test]
     fn test_engine() {
         let mut rand = StdRand::new(0);
diff --git a/afl/src/events/mod.rs b/afl/src/events/mod.rs
index d256f4ec6c..9947472d34 100644
--- a/afl/src/events/mod.rs
+++ b/afl/src/events/mod.rs
@@ -5,13 +5,14 @@ pub mod llmp_translated; // TODO: Abstract away.
 #[cfg(feature = "std")]
 pub mod shmem_translated;
 
+#[cfg(feature = "std")]
 pub use crate::events::llmp::LLMP;
 
 use core::any::Any;
 //use core::any::TypeId;
 use core::fmt::Display;
 
-// TODO use core version
+#[cfg(feature = "std")]
 use std::io::Write;
 
 use crate::AflError;
@@ -95,6 +96,7 @@ impl NewTestcaseEvent {
     }
 }
 
+#[cfg(feature = "std")]
 pub struct LoggerEventManager<W>
 where
     W: Write,
@@ -103,6 +105,7 @@ where
     writer: W,
 }
 
+#[cfg(feature = "std")]
 impl<S, C, E, I, R, W> EventManager<S, C, E, I, R> for LoggerEventManager<W>
 where
     S: State<C, E, I, R>,
@@ -151,6 +154,7 @@ where
     }
 }
 
+#[cfg(feature = "std")]
 impl<W> LoggerEventManager<W>
 where
     W: Write,
diff --git a/afl/src/feedbacks/mod.rs b/afl/src/feedbacks/mod.rs
index 8b6f23fb00..943ae12629 100644
--- a/afl/src/feedbacks/mod.rs
+++ b/afl/src/feedbacks/mod.rs
@@ -1,5 +1,6 @@
 use alloc::rc::Rc;
 use alloc::vec::Vec;
+use alloc::boxed::Box;
 use core::cell::RefCell;
 use core::marker::PhantomData;
 use num::Integer;