diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00bdfe1c..707af5fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,8 @@ Changelog follow https://keepachangelog.com/ format.
         consistency with `ecolab.adhoc`
     *   Added: `epy.pretty_repr_top_level`
     *   Added: `epy.wraps_cls` equivalent of `functools.wraps` but for classes.
+    *   Breaking: `epy.lazy_imports(error_callback=)` has now signature
+        `(Exception) -> None` (instead of `(str) -> None`)
     *   Fixed: `epy.pretty_repr` missing trailing `,` for tuple with single
         element.
 *   `ecolab`:
diff --git a/etils/epy/lazy_imports_utils.py b/etils/epy/lazy_imports_utils.py
index 364f33ae..fea2d92a 100644
--- a/etils/epy/lazy_imports_utils.py
+++ b/etils/epy/lazy_imports_utils.py
@@ -33,7 +33,7 @@
 from typing import Any, Callable, Iterator
 
 
-_ErrorCallback = Callable[[str], None]
+_ErrorCallback = Callable[[Exception], None]
 _SuccessCallback = Callable[[str], None]
 
 
@@ -68,9 +68,9 @@ def _module(self) -> types.ModuleType:
         if self.success_callback is not None:
           self.success_callback(self.module_name)
         return module
-      except ImportError:
+      except ImportError as e:
         if self.error_callback is not None:
-          self.error_callback(self.module_name)
+          self.error_callback(e)
         raise
 
   def __getattr__(self, name: str) -> Any:
@@ -124,8 +124,8 @@ def lazy_imports(
   the original `ecolab.adhoc` context is re-created to import the lazy module.
 
   Args:
-    error_callback: a callback to trigger when an import fails. The callback is
-      passed the name of the imported module as an arg.
+    error_callback: a callback to trigger when an import fails. The exception is
+      passed as an arg, so user can use `epy.reraise(e, 'Additional message')`.
     success_callback: a callback to trigger when an import succeeds. The
       callback is passed the name of the imported module as an arg.
 
diff --git a/etils/epy/lazy_imports_utils_test.py b/etils/epy/lazy_imports_utils_test.py
index b2949ab7..780fbf40 100644
--- a/etils/epy/lazy_imports_utils_test.py
+++ b/etils/epy/lazy_imports_utils_test.py
@@ -79,7 +79,7 @@ def test_error_callback():
     _ = doesnotexist.stack
   except ImportError:
     pass
-  error_callback.assert_called_once_with('doesnotexist')
+  error_callback.assert_called_once()
   success_callback.assert_not_called()