diff --git a/apps/language.c b/apps/language.c
index 73ed0fe39b..bba1359616 100644
--- a/apps/language.c
+++ b/apps/language.c
@@ -31,10 +31,12 @@
    language! */
 #include "max_language_size.h"
 
-/* both these must match the two initial bytes in the binary lang file */
-#define LANGUAGE_COOKIE  0x1a
-#define LANGUAGE_VERSION 0x04
+/* These defines must match the initial bytes in the binary lang file */
+/* See tools/genlang (TODO: Use common include for both) */
+#define LANGUAGE_COOKIE   0x1a
+#define LANGUAGE_VERSION  0x04
 
+#define HEADER_SIZE 3
 
 static unsigned char language_buffer[MAX_LANGUAGE_SIZE];
 
@@ -54,12 +56,12 @@ int lang_load(const char *filename)
     int fsize;
     int fd = open(filename, O_RDONLY);
     int retcode=0;
-    unsigned char lang_header[3];
+    unsigned char lang_header[HEADER_SIZE];
     if(fd < 0)
         return 1;
-    fsize = filesize(fd) - 2;
+    fsize = filesize(fd) - HEADER_SIZE;
     if(fsize <= MAX_LANGUAGE_SIZE) {
-        read(fd, lang_header, 3);
+        read(fd, lang_header, HEADER_SIZE);
         if((lang_header[0] == LANGUAGE_COOKIE) &&
            (lang_header[1] == LANGUAGE_VERSION) &&
            (lang_header[2] == TARGET_ID)) {
diff --git a/tools/genlang b/tools/genlang
index 45171290d6..cedd052839 100755
--- a/tools/genlang
+++ b/tools/genlang
@@ -10,8 +10,10 @@
 # Copyright (C) 2006 - 2008 by Daniel Stenberg
 #
 
-# binary version for the binary lang file
-my $langversion = 4; # 3 was the latest one used in the v1 format
+# See apps/language.c (TODO: Use common include for both)
+# Cookie and binary version for the binary lang file
+my $LANGUAGE_COOKIE   = 0x1a;
+my $LANGUAGE_VERSION  = 0x04;
 
 # A note for future users and readers: The original v1 language system allowed
 # the build to create and use a different language than english built-in. We
@@ -26,7 +28,7 @@ my %user2num =
 
 if(!$ARGV[0]) {
     print <<MOO
-Usage: genlang [options] <langv2 file>
+Usage: genlang [options] <langv4 file>
 
  -p=<prefix>
     Make the tool create a [prefix].c and [prefix].h file.
@@ -659,7 +661,7 @@ elsif($binary) {
 
     open(OUTF, ">$binary") or die "Error: Can't create $binary";
     binmode OUTF;
-    printf OUTF ("\x1a%c%c", $langversion, $target_id); # magic lang file header
+    printf OUTF ("%c%c%c", $LANGUAGE_COOKIE, $LANGUAGE_VERSION, $target_id); # magic lang file header
 
     # loop over the target phrases
     for $i (1 .. $idcount) {