diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 0689ee39cf34ca7755fb6cfdaa3302834fa757f9..3a67e1865fab00c348e0c76e629d55cd6a0d4e01 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -850,7 +850,7 @@ func makePush(size uint64, pushByteSize int) executionFunc {
 	}
 }
 
-// make push instruction function
+// make dup instruction function
 func makeDup(size int64) executionFunc {
 	return func(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
 		stack.dup(evm.interpreter.intPool, int(size))