diff --git a/esp-alloc/CHANGELOG.md b/esp-alloc/CHANGELOG.md
index b9aacdc8e..e2d994a7f 100644
--- a/esp-alloc/CHANGELOG.md
+++ b/esp-alloc/CHANGELOG.md
@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fix problem of not de-allocating memory in some situations (#3949)
 
 ### Removed
 
diff --git a/esp-alloc/src/allocators.rs b/esp-alloc/src/allocators.rs
index 51553ba57..0441733b3 100644
--- a/esp-alloc/src/allocators.rs
+++ b/esp-alloc/src/allocators.rs
@@ -30,7 +30,7 @@ unsafe impl Allocator for EspHeap {
 
     unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout) {
         unsafe {
-            crate::HEAP.dealloc(ptr.as_ptr(), layout);
+            self.dealloc(ptr.as_ptr(), layout);
         }
     }
 }
@@ -45,7 +45,7 @@ unsafe impl CoreAllocator for EspHeap {
 
     unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout) {
         unsafe {
-            crate::HEAP.dealloc(ptr.as_ptr(), layout);
+            self.dealloc(ptr.as_ptr(), layout);
         }
     }
 }