diff --git a/src/libraries/System.Private.CoreLib/Tools/GenUnicodeProp/NumericGraphemeInfo.cs b/src/libraries/System.Private.CoreLib/Tools/GenUnicodeProp/NumericGraphemeInfo.cs
index 2f8c30226f99ec..4f4e30c3176d42 100644
--- a/src/libraries/System.Private.CoreLib/Tools/GenUnicodeProp/NumericGraphemeInfo.cs
+++ b/src/libraries/System.Private.CoreLib/Tools/GenUnicodeProp/NumericGraphemeInfo.cs
@@ -55,8 +55,7 @@ public static byte[] ToDigitBytes(NumericGraphemeInfo input)
         public static byte[] ToNumericBytes(NumericGraphemeInfo input)
         {
             byte[] bytes = new byte[sizeof(double)];
-            double value = input._data.numericValue;
-            BinaryPrimitives.WriteUInt64LittleEndian(bytes, Unsafe.As<double, ulong>(ref value));
+            BinaryPrimitives.WriteDoubleLittleEndian(bytes, input._data.numericValue);
             return bytes;
         }