diff --git a/textio/txCommands.c b/textio/txCommands.c
index 3284c3cf..2c175342 100644
--- a/textio/txCommands.c
+++ b/textio/txCommands.c
@@ -814,14 +814,14 @@ void
 txLogCommand(
     TxCommand *cmd)
 {
-    static char *txButTable[] =
+    static const char *txButTable[] =
     {
 	"left",
 	"middle",
 	"right",
 	0
     };
-    static char *txActTable[] =
+    static const char *txActTable[] =
     {
 	"down",
 	"up",
@@ -829,9 +829,9 @@ txLogCommand(
     };
 
 #ifdef MAGIC_WRAPPER
-    char *pfix = "";
+    const char *pfix = "";
 #else
-    char *pfix = ":";
+    const char *pfix = ":";
 #endif
 
     /* Do not do anything if there is no log file */
diff --git a/textio/txInput.c b/textio/txInput.c
index dd3dc4d1..fdbc39b8 100644
--- a/textio/txInput.c
+++ b/textio/txInput.c
@@ -88,7 +88,7 @@ HashTable cellname_hash;
 
 static int interactive_flag;
 
-char *magic_direction_list[] = {
+const char *magic_direction_list[] = {
   "bottom", "down", "e", "east", "left", "n", "north", "right",
   "s", "south", "top", "up", "w", "west", (char *)NULL };