diff --git a/tests/random-test-client.c b/tests/random-test-client.c
index 593867c..b7c54fd 100644
--- a/tests/random-test-client.c
+++ b/tests/random-test-client.c
@@ -244,6 +244,7 @@ int main(void)
     free(tab_rp_bits);
     free(tab_rq_registers);
     free(tab_rp_registers);
+    free(tab_rw_rp_registers);
 
     /* Close the connection */
     modbus_close(ctx);