diff --git a/headers/private/shared/AboutWindow.h b/headers/private/shared/AboutWindow.h
index 57cf972db8..da7d5c8e37 100644
--- a/headers/private/shared/AboutWindow.h
+++ b/headers/private/shared/AboutWindow.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2007 Haiku, Inc.
+ * Copyright 2007-2009 Haiku, Inc.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -14,8 +14,8 @@
 
 class BAboutWindow {
 	public:
-		BAboutWindow(char *appName, int32 firstCopyrightYear,
-			const char **authors, char *extraInfo = NULL);
+		BAboutWindow(const char *appName, int32 firstCopyrightYear,
+			const char **authors, const char *extraInfo = NULL);
 		virtual ~BAboutWindow();
 
 		void Show();
diff --git a/src/kits/shared/AboutWindow.cpp b/src/kits/shared/AboutWindow.cpp
index df5c78225d..777d107ff9 100644
--- a/src/kits/shared/AboutWindow.cpp
+++ b/src/kits/shared/AboutWindow.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2007 Haiku, Inc.
+ * Copyright 2007-2009 Haiku, Inc.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -16,8 +16,8 @@
 #include <time.h>
 
 
-BAboutWindow::BAboutWindow(char *appName, int32 firstCopyrightYear,
-	const char **authors, char *extraInfo)
+BAboutWindow::BAboutWindow(const char *appName, int32 firstCopyrightYear,
+	const char **authors, const char *extraInfo)
 {
 	fAppName = new BString(appName);