diff --git a/Utils/message.cpp b/Utils/message.cpp
index 0b73c4614..f9e2a0537 100644
--- a/Utils/message.cpp
+++ b/Utils/message.cpp
@@ -610,7 +610,7 @@ void UnHideMessagesDuringNPCDialogue( void )
 	return;
 }
 
-void ScreenMsg( UINT16 usColor, UINT8 ubPriority, STR16 pStringA, ...)
+void ScreenMsg( UINT16 usColor, UINT8 ubPriority, const CHAR16* pStringA, ...)
 {
 	//__try
 	//{
diff --git a/Utils/message.h b/Utils/message.h
index d071fae60..3ed1568ad 100644
--- a/Utils/message.h
+++ b/Utils/message.h
@@ -55,7 +55,7 @@ extern BOOLEAN fDisableJustForIan;
 // are we allowed to beep on message scroll in tactical
 extern BOOLEAN fOkToBeepNewMessage;
 
-void ScreenMsg( UINT16 usColor, UINT8 ubPriority, STR16 pStringA, ...);
+void ScreenMsg( UINT16 usColor, UINT8 ubPriority, const CHAR16* pStringA, ...);
 
 // same as screen message, but only display to mapscreen message system, not tactical
 void MapScreenMessage( UINT16 usColor, UINT8 ubPriority, STR16 pStringA, ...);