diff --git a/programs/pkey/ecdh_curve25519.c b/programs/pkey/ecdh_curve25519.c
index 690f9687f7..017d01cded 100644
--- a/programs/pkey/ecdh_curve25519.c
+++ b/programs/pkey/ecdh_curve25519.c
@@ -79,9 +79,9 @@ int main( int argc, char *argv[] )
 
     mbedtls_entropy_init( &entropy );
     if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
-                                &entropy,
-                                (const unsigned char *) pers,
-                                sizeof pers ) ) != 0 )
+                                       &entropy,
+                                       (const unsigned char *) pers,
+                                       sizeof pers ) ) != 0 )
     {
         mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n",
                         ret );