diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index 2d50b33..c9fe63f 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -529,6 +529,8 @@
 
         TEST_ASSERT( strcmp( (char *) output, result_str ) == 0 );
     }
+#else
+    ((void) result_str);
 #endif
 
     mbedtls_x509_crt_free( &crt );