diff --git a/headers/os/support/String.h b/headers/os/support/String.h
index 614a5da075..f0ac9ff477 100644
--- a/headers/os/support/String.h
+++ b/headers/os/support/String.h
@@ -48,6 +48,8 @@ public:
 			BString&		SetToChars(const char* string, int32 charCount);
 			BString&		SetToChars(const BString& string, int32 charCount);
 			BString&		AdoptChars(BString& from, int32 charCount);
+			
+			BString&		SetToArguments(const char *format, ...);
 
 			// Substring copying
 			BString&		CopyInto(BString& into, int32 fromOffset,