Moved POLARSSL_FS_IO check to .function from .data
diff --git a/tests/suites/test_suite_x509write.function b/tests/suites/test_suite_x509write.function
index 68c7b1c..f4bde8d 100644
--- a/tests/suites/test_suite_x509write.function
+++ b/tests/suites/test_suite_x509write.function
@@ -6,7 +6,7 @@
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
- * depends_on:POLARSSL_X509_WRITE_C:POLARSSL_BIGNUM_C
+ * depends_on:POLARSSL_X509_WRITE_C:POLARSSL_BIGNUM_C:POLARSSL_FS_IO
  * END_DEPENDENCIES
  */