diff --git a/afl/src/engines/mod.rs b/afl/src/engines/mod.rs
index f734aaa7d9..6f536b636e 100644
--- a/afl/src/engines/mod.rs
+++ b/afl/src/engines/mod.rs
@@ -66,33 +66,6 @@ where
         self.metadatas_mut().insert(meta.name(), meta);
     }
 
-    /// Get the linked observers
-    fn observers(&self) -> &[Rc<RefCell<dyn Observer>>];
-
-    /// Get the linked observers
-    fn observers_mut(&mut self) -> &mut Vec<Rc<RefCell<dyn Observer>>>;
-
-    /// Add a linked observer
-    fn add_observer(&mut self, observer: Rc<RefCell<dyn Observer>>) {
-        self.observers_mut().push(observer);
-    }
-
-    /// Reset the state of all the observes linked to this executor
-    fn reset_observers(&mut self) -> Result<(), AflError> {
-        for observer in self.observers() {
-            observer.borrow_mut().reset()?;
-        }
-        Ok(())
-    }
-
-    /// Run the post exec hook for all the observes linked to this executor
-    fn post_exec_observers(&mut self) -> Result<(), AflError> {
-        self.observers()
-            .iter()
-            .map(|x| x.borrow_mut().post_exec())
-            .fold(Ok(()), |acc, x| if x.is_err() { x } else { acc })
-    }
-
     /// Returns vector of feebacks
     fn feedbacks(&self) -> &[Box<dyn Feedback<I>>];
 
diff --git a/afl/src/executors/inmemory.rs b/afl/src/executors/inmemory.rs
index b51f927496..6acca6b8b3 100644
--- a/afl/src/executors/inmemory.rs
+++ b/afl/src/executors/inmemory.rs
@@ -5,6 +5,7 @@ use core::ptr;
 
 use crate::executors::{Executor, ExitKind};
 use crate::inputs::Input;
+use crate::metamap::NamedAnyMap;
 use crate::AflError;
 
 type HarnessFunction<I> = fn(&dyn Executor<I>, &[u8]) -> ExitKind;
@@ -14,15 +15,7 @@ where
     I: Input,
 {
     harness: HarnessFunction<I>,
-}
-
-impl<I> Into<Rc<RefCell<Self>>> for InMemoryExecutor<I>
-where
-    I: Input,
-{
-    fn into(self) -> Rc<RefCell<Self>> {
-        Rc::new(RefCell::new(self))
-    }
+    observers: NamedAnyMap,
 }
 
 static mut CURRENT_INMEMORY_EXECUTOR_PTR: *const c_void = ptr::null();
diff --git a/afl/src/executors/mod.rs b/afl/src/executors/mod.rs
index 40bcafe64f..aaf98385b5 100644
--- a/afl/src/executors/mod.rs
+++ b/afl/src/executors/mod.rs
@@ -1,6 +1,8 @@
 pub mod inmemory;
 
 use crate::inputs::Input;
+use crate::observers::Observer;
+use crate::metamap::NamedAnyMap;
 use crate::AflError;
 
 pub enum ExitKind {
@@ -18,4 +20,31 @@ where
 {
     /// Instruct the target about the input and run
     fn run_target(&mut self, input: &I) -> Result<ExitKind, AflError>;
+
+    /// Get the linked observers
+    fn observers(&self) -> &NamedAnyMap;
+
+    /// Get the linked observers
+    fn observers_mut(&mut self) -> &mut NamedAnyMap;
+
+    /// Add a linked observer
+    fn add_observer(&mut self, observer: Box<dyn Observer>, name: &'static str) {
+        self.observers_mut().push(observer);
+    }
+
+    /// Reset the state of all the observes linked to this executor
+    fn reset_observers(&mut self) -> Result<(), AflError> {
+        for observer in self.observers_mut() {
+            observer.reset()?;
+        }
+        Ok(())
+    }
+
+    /// Run the post exec hook for all the observes linked to this executor
+    fn post_exec_observers(&mut self) -> Result<(), AflError> {
+        self.observers_mut()
+            .iter()
+            .map(|x| x.post_exec())
+            .fold(Ok(()), |acc, x| if x.is_err() { x } else { acc })
+    }
 }
diff --git a/afl/src/observers/mod.rs b/afl/src/observers/mod.rs
index 4db03f8d5a..f790e6a15e 100644
--- a/afl/src/observers/mod.rs
+++ b/afl/src/observers/mod.rs
@@ -3,13 +3,14 @@ extern crate num;
 use alloc::rc::Rc;
 use core::cell::RefCell;
 use core::slice::from_raw_parts_mut;
+use core::any::Any;
 use num::Integer;
 
 use crate::AflError;
 
 /// Observers observe different information about the target.
 /// They can then be used by various sorts of feedback.
-pub trait Observer {
+pub trait Observer: Any {
     fn flush(&mut self) -> Result<(), AflError> {
         Ok(())
     }