diff --git a/build/params_2k.go b/build/params_2k.go
index f822d701e..6b8bf04f2 100644
--- a/build/params_2k.go
+++ b/build/params_2k.go
@@ -21,6 +21,7 @@ const GenesisFile = ""
 
 var NetworkBundle = "devnet"
 var BundleOverrides map[actorstypes.Version]string
+var ActorDebugging = true
 
 const GenesisNetworkVersion = network.Version18
 
diff --git a/build/params_butterfly.go b/build/params_butterfly.go
index 6f0a64598..a4ec220ae 100644
--- a/build/params_butterfly.go
+++ b/build/params_butterfly.go
@@ -23,6 +23,7 @@ const GenesisNetworkVersion = network.Version16
 
 var NetworkBundle = "butterflynet"
 var BundleOverrides map[actorstypes.Version]string
+var ActorDebugging = false
 
 const BootstrappersFile = "butterflynet.pi"
 const GenesisFile = "butterflynet.car"
diff --git a/build/params_calibnet.go b/build/params_calibnet.go
index f1aacc506..2c1fd80b4 100644
--- a/build/params_calibnet.go
+++ b/build/params_calibnet.go
@@ -26,6 +26,7 @@ const GenesisNetworkVersion = network.Version0
 
 var NetworkBundle = "calibrationnet"
 var BundleOverrides map[actorstypes.Version]string
+var ActorDebugging = false
 
 const BootstrappersFile = "calibnet.pi"
 const GenesisFile = "calibnet.car"
diff --git a/build/params_interop.go b/build/params_interop.go
index dbc619e1b..e111a461d 100644
--- a/build/params_interop.go
+++ b/build/params_interop.go
@@ -20,6 +20,7 @@ import (
 
 var NetworkBundle = "caterpillarnet"
 var BundleOverrides map[actorstypes.Version]string
+var ActorDebugging = false
 
 const BootstrappersFile = "interopnet.pi"
 const GenesisFile = "interopnet.car"
diff --git a/build/params_mainnet.go b/build/params_mainnet.go
index e2320c3c9..c94162b26 100644
--- a/build/params_mainnet.go
+++ b/build/params_mainnet.go
@@ -25,6 +25,9 @@ var NetworkBundle = "mainnet"
 // NOTE: DO NOT change this unless you REALLY know what you're doing. This is consensus critical.
 var BundleOverrides map[actorstypes.Version]string
 
+// NOTE: DO NOT change this unless you REALLY know what you're doing. This is consensus critical.
+const ActorDebugging = false
+
 const GenesisNetworkVersion = network.Version0
 
 const BootstrappersFile = "mainnet.pi"
diff --git a/build/params_testground.go b/build/params_testground.go
index dcdee888d..db8d47919 100644
--- a/build/params_testground.go
+++ b/build/params_testground.go
@@ -116,6 +116,7 @@ var (
 	GenesisNetworkVersion = network.Version0
 	NetworkBundle         = "devnet"
 	BundleOverrides       map[actorstypes.Version]string
+	ActorDebugging        = true
 
 	NewestNetworkVersion       = network.Version16
 	ActorUpgradeNetworkVersion = network.Version16
diff --git a/build/params_wallaby.go b/build/params_wallaby.go
index 8eca3186f..96ce9fe51 100644
--- a/build/params_wallaby.go
+++ b/build/params_wallaby.go
@@ -17,6 +17,7 @@ import (
 
 var NetworkBundle = "wallaby"
 var BundleOverrides map[actors.Version]string
+var ActorDebugging = true
 
 const BootstrappersFile = "wallabynet.pi"
 const GenesisFile = "wallabynet.car"
diff --git a/chain/vm/fvm.go b/chain/vm/fvm.go
index 440470761..4c34021f7 100644
--- a/chain/vm/fvm.go
+++ b/chain/vm/fvm.go
@@ -303,6 +303,7 @@ func defaultFVMOpts(ctx context.Context, opts *VMOpts) (*ffi.FVMOpts, error) {
 		NetworkVersion: opts.NetworkVersion,
 		StateBase:      opts.StateBase,
 		Tracing:        opts.Tracing || EnableDetailedTracing,
+		Debug:          build.ActorDebugging,
 	}, nil
 
 }