diff --git a/ethcore/src/engines/mod.rs b/ethcore/src/engines/mod.rs
index c978cd5e3..aef83c3bd 100644
--- a/ethcore/src/engines/mod.rs
+++ b/ethcore/src/engines/mod.rs
@@ -394,7 +394,7 @@ pub trait Engine : Sync + Send {
 /// Common engine utilities
 pub mod common {
 	use std::sync::Arc;
-	use block::{ExecutedBlock, IsBlock};
+	use block::ExecutedBlock;
 	use error::Error;
 	use transaction::SYSTEM_ADDRESS;
 	use executive::Executive;
@@ -473,20 +473,19 @@ pub mod common {
 
 	/// Trace rewards on closing block
 	pub fn bestow_block_reward<E: Engine + ?Sized>(block: &mut ExecutedBlock, engine: &E) -> Result<(), Error> {
-		let tracing_enabled = block.tracing_enabled();
-		let fields = block.fields_mut();
-		let mut tracer = ExecutiveTracer::default();
+		let fields = block.fields_mut();		
 		// Bestow block reward
 		let reward = engine.params().block_reward;
 		let res = fields.state.add_balance(fields.header.author(), &reward, CleanupMode::NoEmpty)
 			.map_err(::error::Error::from)
 			.and_then(|_| fields.state.commit());
 
-		if tracing_enabled {
-			let block_author = fields.header.author().clone();
-			tracer.trace_reward(block_author, engine.params().block_reward, RewardType::Block);
-			fields.traces.as_mut().map(|mut traces| traces.push(tracer.traces()));
-		}
+		let block_author = fields.header.author().clone();
+		fields.traces.as_mut().map(|mut traces| {
+  			let mut tracer = ExecutiveTracer::default();			
+  			tracer.trace_reward(block_author, engine.params().block_reward, RewardType::Block);
+  			traces.push(tracer.traces())
+		});
 
 		// Commit state so that we can actually figure out the state root.
 		if let Err(ref e) = res {
diff --git a/ethcore/src/engines/null_engine.rs b/ethcore/src/engines/null_engine.rs
index 378637a5e..1deaabca0 100644
--- a/ethcore/src/engines/null_engine.rs
+++ b/ethcore/src/engines/null_engine.rs
@@ -102,7 +102,9 @@ impl Engine for NullEngine {
 				&(result_uncle_reward),
 				CleanupMode::NoEmpty
 			)?;
-			tracer.trace_reward(uncle_author, result_uncle_reward, RewardType::Uncle);
+			if tracing_enabled {
+				tracer.trace_reward(uncle_author, result_uncle_reward, RewardType::Uncle);
+			}			
 		}
 
 		fields.state.commit()?;