diff --git a/src/mscorlib/src/System/String.cs b/src/mscorlib/src/System/String.cs
index bbc96d266cc9..6974cdea97bf 100644
--- a/src/mscorlib/src/System/String.cs
+++ b/src/mscorlib/src/System/String.cs
@@ -697,6 +697,7 @@ public static string Create<TState>(int length, TState state, SpanAction<char, T
             throw new ArgumentOutOfRangeException(nameof(length));
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static implicit operator ReadOnlySpan<char>(string value) =>
             value != null ? new ReadOnlySpan<char>(ref value.GetRawStringData(), value.Length) : default;