diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index a8a067086f62d8..ea719d3c5c9c05 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -5938,11 +5938,7 @@ void DiffieHellman::ComputeSecret(const FunctionCallbackInfo<Value>& args) {
 
   ClearErrorOnReturn clear_error_on_return;
 
-  if (args.Length() == 0) {
-    return THROW_ERR_MISSING_ARGS(
-        env, "Other party's public key argument is mandatory");
-  }
-
+  CHECK_EQ(args.Length(), 1);
   THROW_AND_RETURN_IF_NOT_BUFFER(env, args[0], "Other party's public key");
   ArrayBufferViewContents<unsigned char> key_buf(args[0].As<ArrayBufferView>());
   BignumPointer key(BN_bin2bn(key_buf.data(), key_buf.length(), nullptr));
@@ -5993,11 +5989,7 @@ void DiffieHellman::SetKey(const FunctionCallbackInfo<Value>& args,
 
   char errmsg[64];
 
-  if (args.Length() == 0) {
-    snprintf(errmsg, sizeof(errmsg), "%s argument is mandatory", what);
-    return THROW_ERR_MISSING_ARGS(env, errmsg);
-  }
-
+  CHECK_EQ(args.Length(), 1);
   if (!Buffer::HasInstance(args[0])) {
     snprintf(errmsg, sizeof(errmsg), "%s must be a buffer", what);
     return THROW_ERR_INVALID_ARG_TYPE(env, errmsg);