diff --git a/Sources/BitcoinKitPrivate/BitcoinKit.Private.swift b/Sources/BitcoinKitPrivate/BitcoinKit.Private.swift
index 83006ab2..92d63a2f 100644
--- a/Sources/BitcoinKitPrivate/BitcoinKit.Private.swift
+++ b/Sources/BitcoinKitPrivate/BitcoinKit.Private.swift
@@ -228,9 +228,11 @@ public class _HDKey {
             //if BN_is_zero(privateKeyNum) {
             //    return nil
             //}
+            /*
             if privateKeyNum.pointee.top == 0 { // BN_is_zero
                 return nil
             }
+            */
             let numBytes = ((BN_num_bits(privateKeyNum)+7)/8) // BN_num_bytes
             result = Data(count: Int(numBytes))
             result.withUnsafeMutableBytes { (ptr: UnsafeMutableRawBufferPointer) in