diff --git a/Source/C++/Core/Ap4CommonEncryption.cpp b/Source/C++/Core/Ap4CommonEncryption.cpp
index efd36567d..94acb39d0 100644
--- a/Source/C++/Core/Ap4CommonEncryption.cpp
+++ b/Source/C++/Core/Ap4CommonEncryption.cpp
@@ -1873,6 +1873,8 @@ class AP4_CencFragmentDecrypter : public AP4_Processor::FragmentHandler {
     m_SaizAtom(saiz_atom),
     m_SampleEncryptionAtom(sample_encryption_atom) {}
 
+    ~AP4_CencFragmentDecrypter() { delete m_SampleDecrypter; }
+
     // methods
     virtual AP4_Result ProcessFragment();
     virtual AP4_Result FinishFragment();