1 files changed, 1 insertions, 1 deletions
diff --git a/src/System.Private.CoreLib/shared/System/ICustomFormatter.cs b/src/System.Private.CoreLib/shared/System/ICustomFormatter.cs
index 47340f309..cd798b4a1 100644
--- a/src/System.Private.CoreLib/shared/System/ICustomFormatter.cs
+++ b/src/System.Private.CoreLib/shared/System/ICustomFormatter.cs
@@ -19,6 +19,6 @@ namespace System
     public interface ICustomFormatter
     {
         // Interface does not need to be marked with the serializable attribute
-        String Format(String format, Object arg, IFormatProvider formatProvider);
+        string Format(string format, object arg, IFormatProvider formatProvider);
     }
 }