diff --git a/library/bignum.c b/library/bignum.c
index a3201a6..f2a49ec 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -1652,8 +1652,6 @@
     return( ret );
 }
 
-#if defined(POLARSSL_GENPRIME)
-
 /*
  * Modular inverse: X = A^-1 mod N  (HAC 14.61 / 14.64)
  */
@@ -1749,6 +1747,8 @@
     return( ret );
 }
 
+#if defined(POLARSSL_GENPRIME)
+
 static const int small_prime[] =
 {
         3,    5,    7,   11,   13,   17,   19,   23,