diff --git a/src/filter_realcugan.cpp b/src/filter_realcugan.cpp
index 37efd7e..9bde037 100644
--- a/src/filter_realcugan.cpp
+++ b/src/filter_realcugan.cpp
@@ -33,6 +33,7 @@ FilterRealcugan::FilterRealcugan(
 
 FilterRealcugan::~FilterRealcugan() {
     delete realcugan_;
+    realcugan_ = nullptr;
 }
 
 int FilterRealcugan::init(AVCodecContext* dec_ctx, AVCodecContext* enc_ctx, AVBufferRef*) {
diff --git a/src/filter_realesrgan.cpp b/src/filter_realesrgan.cpp
index 9b5ce7f..389f726 100644
--- a/src/filter_realesrgan.cpp
+++ b/src/filter_realesrgan.cpp
@@ -27,6 +27,7 @@ FilterRealesrgan::FilterRealesrgan(
 
 FilterRealesrgan::~FilterRealesrgan() {
     delete realesrgan_;
+    realesrgan_ = nullptr;
 }
 
 int FilterRealesrgan::init(AVCodecContext* dec_ctx, AVCodecContext* enc_ctx, AVBufferRef*) {
diff --git a/src/interpolator_rife.cpp b/src/interpolator_rife.cpp
index 08ac3c4..2c0f28f 100644
--- a/src/interpolator_rife.cpp
+++ b/src/interpolator_rife.cpp
@@ -30,6 +30,7 @@ InterpolatorRIFE::InterpolatorRIFE(
 
 InterpolatorRIFE::~InterpolatorRIFE() {
     delete rife_;
+    rife_ = nullptr;
 }
 
 int InterpolatorRIFE::init(AVCodecContext* dec_ctx, AVCodecContext* enc_ctx, AVBufferRef*) {