1 files changed, 3 insertions, 3 deletions
diff --git a/gr-audio/lib/alsa/alsa_source.h b/gr-audio/lib/alsa/alsa_source.h
index cfda8e7638..1e34d9a24b 100644
--- a/gr-audio/lib/alsa/alsa_source.h
+++ b/gr-audio/lib/alsa/alsa_source.h
@@ -67,13 +67,13 @@ class alsa_source : public source
 
 public:
     alsa_source(int sampling_rate, const std::string device_name, bool ok_to_block);
-    ~alsa_source();
+    ~alsa_source() override;
 
-    bool check_topology(int ninputs, int noutputs);
+    bool check_topology(int ninputs, int noutputs) override;
 
     int work(int noutput_items,
              gr_vector_const_void_star& input_items,
-             gr_vector_void_star& output_items);
+             gr_vector_void_star& output_items) override;
 
 protected:
     bool read_buffer(void* buffer, unsigned nframes, unsigned sizeof_frame);