diff --git a/core/vm/interpreter.go b/core/vm/interpreter.go
index 12f43f226a..b9605ab7f5 100644
--- a/core/vm/interpreter.go
+++ b/core/vm/interpreter.go
@@ -293,7 +293,7 @@ func (in *EVMInterpreter) Run(contract *Contract, input []byte, readOnly bool) (
 
 
 		}
-		// Do tracing before memory expansion
+		// Do tracing before potential memory expansion
 		if debug {
 			if in.evm.Config.Tracer.OnGasChange != nil {
 				in.evm.Config.Tracer.OnGasChange(gasCopy, gasCopy-cost, tracing.GasChangeCallOpCode)