Add forgotten #ifdef and depends_on
diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index 268721e..5cdb1c8 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -54,7 +54,7 @@
 }
 /* END_CASE */
 
-/* BEGIN_CASE */
+/* BEGIN_CASE depends_on:POLARSSL_RSA_C */
 void pk_set_rsa_padding( int type, int padding, int hash_id, int ret )
 {
     pk_context pk;