diff --git a/src/libraries/System.Private.CoreLib/src/System/Text/Ascii.Utility.cs b/src/libraries/System.Private.CoreLib/src/System/Text/Ascii.Utility.cs
index 45b73be6a618d..ab55607c944c6 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Text/Ascii.Utility.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Text/Ascii.Utility.cs
@@ -109,6 +109,10 @@ internal static unsafe nuint GetIndexOfFirstNonAsciiByte(byte* pBuffer, nuint bu
             {
                 return GetIndexOfFirstNonAsciiByte_Intrinsified(pBuffer, bufferLength);
             }
+            else if (Vector128.IsHardwareAccelerated)
+            {
+                return GetIndexOfFirstNonAsciiByte_Vector(pBuffer, bufferLength);
+            }
             else
             {
                 return GetIndexOfFirstNonAsciiByte_Default(pBuffer, bufferLength);