diff --git a/src/globals.h b/src/globals.h
index a887a96..a1f48cc 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -39,6 +39,9 @@
 *                    Constants and type declarations                    *
 ************************************************************************/
 
+#define MIN_COLUMNS		(80)	/* Minimum number of columns in terminal */
+#define MIN_LINES		(24)	/* Minimum number of lines in terminal */
+
 #define MAX_X			(38)	/* Map dimensions MAP_X x MAP_Y */
 #define MAX_Y			(12)
 #define STAR_RATIO		(0.10)	/* 10% of map should be stars */
diff --git a/src/system.h b/src/system.h
index db7a87c..a6b68cd 100644
--- a/src/system.h
+++ b/src/system.h
@@ -70,6 +70,13 @@
 *                       Miscellaneous definitions                       *
 ************************************************************************/
 
+// Visibility of the cursor in Curses
+#define CURS_INVISIBLE   (0)
+#define CURS_NORMAL      (1)
+#define CURS_VISIBLE     (1)
+#define CURS_VERYVISIBLE (2)
+
+
 // For future use in internationalisation
 #ifndef _
 #  define _(x) (x)
diff --git a/src/trader.c b/src/trader.c
index adfb58c..8bcd4d6 100644
--- a/src/trader.c
+++ b/src/trader.c
@@ -62,6 +62,7 @@ int main (int argc, char *argv[])
     // Testing...
     initscr();
     noecho();
+    curs_set(CURS_INVISIBLE);
     timeout(-1);
     keypad(stdscr, true);
     raw();
@@ -76,6 +77,8 @@ int main (int argc, char *argv[])
 
     printw(_("Type some keys (^C to exit):\n\n"));
 
+    curs_set(CURS_VERYVISIBLE);
+
     int c = 0;
     while ((c = getch()) != 3) {
 	if ((c >= 0) && (c < 32)) {
diff --git a/src/trader.h b/src/trader.h
index 86d3b89..d99cf89 100644
--- a/src/trader.h
+++ b/src/trader.h
@@ -35,7 +35,8 @@
 *                          Global definitions                           *
 ************************************************************************/
 
-#define GAME_FILE_API_VERSION "7.0"	/* For game loads and saves */
+#define GAME_FILE_HEADER	"Star Traders Saved Game"
+#define GAME_FILE_API_VERSION	"7.0"	/* For game loads and saves */
 
 
 /************************************************************************