diff --git a/verl/workers/config/actor.py b/verl/workers/config/actor.py
index f33bb9269cc..88e6256458e 100644
--- a/verl/workers/config/actor.py
+++ b/verl/workers/config/actor.py
@@ -305,6 +305,10 @@ def __post_init__(self):
         """Validate FSDP actor configuration parameters."""
         super().__post_init__()
         self.engine = self.fsdp_config
+        # Sync strategy to engine config so engine_workers can pick the right FSDP version.
+        # EngineConfig.strategy defaults to None, so without this, engine_workers.py always
+        # falls back to FSDP1 even when actor.strategy="fsdp2".
+        object.__setattr__(self.engine, "strategy", self.strategy)
 
         # backward compatibility
         if self.ulysses_sequence_parallel_size > 1:
diff --git a/verl/workers/config/critic.py b/verl/workers/config/critic.py
index ab5ae4fc83e..cf63fa8ef8b 100644
--- a/verl/workers/config/critic.py
+++ b/verl/workers/config/critic.py
@@ -197,6 +197,10 @@ def __post_init__(self):
         """Validate FSDP critic configuration parameters."""
         super().__post_init__()
         self.engine = self.fsdp
+        # Sync strategy to engine config so engine_workers can pick the right FSDP version.
+        # EngineConfig.strategy defaults to None, so without this, engine_workers.py always
+        # falls back to FSDP1 even when critic.strategy="fsdp2".
+        object.__setattr__(self.engine, "strategy", self.strategy)
 
         if self.strategy in {"fsdp", "fsdp2"}:
             if self.ulysses_sequence_parallel_size > 1: