diff --git a/docs/misc/changelog.rst b/docs/misc/changelog.rst
index a9e94af..368f7a6 100644
--- a/docs/misc/changelog.rst
+++ b/docs/misc/changelog.rst
@@ -32,6 +32,8 @@ Deprecations:
 Others:
 ^^^^^^^
 
+- Fixed ``train_freq`` type annotation for tqc and qrdqn (@Armandpl)
+
 Documentation:
 ^^^^^^^^^^^^^^
 - Add some additional notes about ``MaskablePPO`` (evaluation and multi-process) (@icheered)
@@ -545,4 +547,4 @@ Contributors:
 -------------
 
 @ku2482 @guyk1971 @minhlong94 @ayeright @kronion @glmcdona @cyprienc @sgillen @Gregwar @rnederstigt @qgallouedec
-@mlodel @CppMaster @burakdmb @honglu2875 @ZikangXiong @AlexPasqua @jonasreiher @icheered
+@mlodel @CppMaster @burakdmb @honglu2875 @ZikangXiong @AlexPasqua @jonasreiher @icheered @Armandpl
diff --git a/sb3_contrib/qrdqn/qrdqn.py b/sb3_contrib/qrdqn/qrdqn.py
index 303862e..5271ac8 100644
--- a/sb3_contrib/qrdqn/qrdqn.py
+++ b/sb3_contrib/qrdqn/qrdqn.py
@@ -82,7 +82,7 @@ class QRDQN(OffPolicyAlgorithm):
         batch_size: int = 32,
         tau: float = 1.0,
         gamma: float = 0.99,
-        train_freq: int = 4,
+        train_freq: Union[int, Tuple[int, str]] = 4,
         gradient_steps: int = 1,
         replay_buffer_class: Optional[Type[ReplayBuffer]] = None,
         replay_buffer_kwargs: Optional[Dict[str, Any]] = None,
diff --git a/sb3_contrib/tqc/tqc.py b/sb3_contrib/tqc/tqc.py
index f5e4ec6..d4d8538 100644
--- a/sb3_contrib/tqc/tqc.py
+++ b/sb3_contrib/tqc/tqc.py
@@ -88,7 +88,7 @@ class TQC(OffPolicyAlgorithm):
         batch_size: int = 256,
         tau: float = 0.005,
         gamma: float = 0.99,
-        train_freq: int = 1,
+        train_freq: Union[int, Tuple[int, str]] = 1,
         gradient_steps: int = 1,
         action_noise: Optional[ActionNoise] = None,
         replay_buffer_class: Optional[Type[ReplayBuffer]] = None,