diff --git a/fesvr/memif.h b/fesvr/memif.h
index 9eebed4e..7c73f489 100644
--- a/fesvr/memif.h
+++ b/fesvr/memif.h
@@ -33,6 +33,8 @@ public:
   virtual memif_endianness_t get_target_endianness() const {
     return memif_endianness_undecided;
   }
+
+  virtual ~chunked_memif_t() = default;
 };
 
 class memif_t
diff --git a/riscv/simif.h b/riscv/simif.h
index 0e75d45b..75e865eb 100644
--- a/riscv/simif.h
+++ b/riscv/simif.h
@@ -19,6 +19,8 @@ public:
 
   virtual const char* get_symbol(uint64_t addr) = 0;
 
+  virtual ~simif_t() = default;
+
 };
 
 #endif
diff --git a/riscv/trap.h b/riscv/trap.h
index 8347c6eb..b5afce9a 100644
--- a/riscv/trap.h
+++ b/riscv/trap.h
@@ -33,6 +33,8 @@ class trap_t
     return _name;
   }
 
+  virtual ~trap_t() = default;
+
  private:
   char _name[16];
   reg_t which;