diff --git a/src/interpret.cpp b/src/interpret.cpp
index 6a66c1778b..c36ebde450 100644
--- a/src/interpret.cpp
+++ b/src/interpret.cpp
@@ -3067,7 +3067,7 @@ class MyProcessor: public Processor {
     abort(s);
   }
 
-  virtual void addCompilationHandler(CompilationHandler* handler) {
+  virtual void addCompilationHandler(CompilationHandler*) {
     abort(s);
   }