1 files changed, 16 insertions, 0 deletions
diff --git a/src/theory/output_channel.h b/src/theory/output_channel.h
index cec499a13..c530434f5 100644
--- a/src/theory/output_channel.h
+++ b/src/theory/output_channel.h
@@ -28,6 +28,14 @@ class OutputChannel {
 public:
 
   /**
+   * Destructs an OutputChannel.  This implementation does nothing,
+   * but we need a virtual destructor for safety in case subclasses
+   * have a destructor.
+   */
+  virtual ~OutputChannel() {
+  }
+
+  /**
    * With safePoint(), the theory signals that it is at a safe point
    * and can be interrupted.
    */
@@ -68,6 +76,14 @@ class ExplainOutputChannel {
 public:
 
   /**
+   * Destructs an ExplainOutputChannel.  This implementation does
+   * nothing, but we need a virtual destructor for safety in case
+   * subclasses have a destructor.
+   */
+  virtual ~ExplainOutputChannel() {
+  }
+
+  /**
    * With safePoint(), the theory signals that it is at a safe point
    * and can be interrupted.  The default implementation never
    * interrupts.