diff --git a/library/bignum.c b/library/bignum.c
index 1685d308a9..4b8fa80305 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -1471,8 +1471,6 @@ cleanup:
     return( ret );
 }
 
-#if defined(POLARSSL_GENPRIME)
-
 /*
  * Greatest common divisor: G = gcd(A, B)  (HAC 14.54)
  */
@@ -1524,6 +1522,8 @@ cleanup:
     return( ret );
 }
 
+#if defined(POLARSSL_GENPRIME)
+
 /*
  * Modular inverse: X = A^-1 mod N  (HAC 14.61 / 14.64)
  */