1 files changed, 3 insertions, 0 deletions
diff --git a/rotord/rotor.h b/rotord/rotor.h
index a0a310f..9494094 100755
--- a/rotord/rotor.h
+++ b/rotord/rotor.h
@@ -363,11 +363,13 @@ namespace Rotor {
 		};
 	class Signal_node: public Node{
 		public:
+			virtual ~Signal_node(){};
 			const float get_output(const Time_spec &time) { update_params(time); return output(time); };
 			virtual const float output(const Time_spec &time) { return 0.0f; };
 	};
 	class Image_node: public Node{
 		public:
+			virtual ~Image_node(){};
 			vector<Image_input*> image_inputs;			//image node also has image inputs and outputs
 			void create_image_input(const string &description) {image_inputs.push_back(new Image_input(description));};
 			Image *get_output(const Frame_spec &frame) { update_params((Time_spec)frame); return output(frame); };
@@ -379,6 +381,7 @@ namespace Rotor {
 	};
 	class Base_audio_processor: public Signal_node {
 		public:
+			virtual ~Base_audio_processor(){};
 			virtual int process_frame(uint8_t *data,int samples)=0;
 			virtual bool init(int _channels,int _bits,int _samples,int _rate)=0;
 			virtual void cleanup()=0;