diff --git a/README.md b/README.md
index 1ec6d23..9873b3b 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Works well on:
 * Windows XP or newer (shellapi.h)
 * MacOS (Cocoa/AppKit)
 
-There is also a stub implementation that returns errors on attempt to create a tray menu.
+The code is C++ friendly and will compile fine in C++98 and up.
 
 # Setup
 
@@ -20,7 +20,7 @@ Before you can compile `tray`, you'll need to add an environment definition befo
 #include <stdio.h>
 #include <string.h>
 
-#define TRAY_WINAPI 1
+#define TRAY_WINAPI
 
 #include "tray.h"
 ...
@@ -31,7 +31,7 @@ Before you can compile `tray`, you'll need to add an environment definition befo
 #include <stdio.h>
 #include <string.h>
 
-#define TRAY_APPINDICATOR 1
+#define TRAY_APPINDICATOR
 
 #include "tray.h"
 ...
@@ -42,12 +42,14 @@ Before you can compile `tray`, you'll need to add an environment definition befo
 #include <stdio.h>
 #include <string.h>
 
-#define TRAY_APPKIT 1
+#define TRAY_APPKIT
 
 #include "tray.h"
 ...
 ```
 
+Failure to define one of the three above will result in a compile-time error.
+
 # Demo
 
 The included example `.c` files can be compiled based on your environment.
@@ -67,12 +69,16 @@ $> a [Enter]
 # Example
 
 ```c
+struct tray_menu menus[] = {
+	{ "Toggle me", 0, 0, toggle_cb, NULL },
+	{ "-"        , 0, 0, NULL     , NULL },
+	{ "Quit"     , 0, 0, quit_cb  , NULL },
+	{ NULL       , 0, 0, NULL     , NULL }
+};
+
 struct tray tray = {
     .icon = "icon.png",
-    .menu = (struct tray_menu[]){{"Toggle me", 0, 0, toggle_cb, NULL},
-                                 {"-", 0, 0, NULL, NULL},
-                                 {"Quit", 0, 0, quit_cb, NULL},
-                                 {NULL, 0, 0, NULL, NULL}},
+    .menu = menus,
 };
 
 void toggle_cb(struct tray_menu *item) {
diff --git a/tray.h b/tray.h
index 4ba47ea..ee9ce07 100644
--- a/tray.h
+++ b/tray.h
@@ -4,12 +4,12 @@
 struct tray_menu;
 
 struct tray {
-  char *icon;
+  const char *icon;
   struct tray_menu *menu;
 };
 
 struct tray_menu {
-  char *text;
+  const char *text;
   int disabled;
   int checked;
 
@@ -279,7 +279,7 @@ static HMENU _tray_menu(struct tray_menu *m, UINT *id) {
         item.fState |= MFS_CHECKED;
       }
       item.wID = *id;
-      item.dwTypeData = m->text;
+      item.dwTypeData = (LPSTR)m->text;
       item.dwItemData = (ULONG_PTR)m;
 
       InsertMenuItem(hmenu, *id, TRUE, &item);
@@ -361,10 +361,7 @@ static void tray_exit() {
   UnregisterClass(WC_TRAY_CLASS_NAME, GetModuleHandle(NULL));
 }
 #else
-static int tray_init(struct tray *tray) { return -1; }
-static int tray_loop(int blocking) { return -1; }
-static void tray_update(struct tray *tray) {}
-static void tray_exit();
+#error Please define TRAY_WINAPI, TRAY_APPINDICATOR or TRAY_APPKIT before including this file.
 #endif
 
 #endif /* TRAY_H */