diff --git a/crypto/bn/bn_prime.h b/crypto/bn/bn_prime.h
index 8bb168517..b7cf9a9bf 100644
--- a/crypto/bn/bn_prime.h
+++ b/crypto/bn/bn_prime.h
@@ -61,7 +61,7 @@
 #else
 #define NUMPRIMES 54
 #endif
-static unsigned int primes[NUMPRIMES]=
+static const unsigned int primes[NUMPRIMES]=
 	{
 	   2,   3,   5,   7,  11,  13,  17,  19,
 	  23,  29,  31,  37,  41,  43,  47,  53,
diff --git a/crypto/bn/bn_prime.pl b/crypto/bn/bn_prime.pl
index bfe577643..9fc376548 100644
--- a/crypto/bn/bn_prime.pl
+++ b/crypto/bn/bn_prime.pl
@@ -104,7 +104,7 @@ printf "#define NUMPRIMES %d\n",$num;
 printf "#else\n";
 printf "#define NUMPRIMES %d\n",$eight;
 printf "#endif\n";
-print "static unsigned int primes[NUMPRIMES]=\n\t{\n\t";
+print "static const unsigned int primes[NUMPRIMES]=\n\t{\n\t";
 $init=0;
 for ($i=0; $i <= $#primes; $i++)
 	{