diff --git a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.cpp b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.cpp
index 95e71f91b..53b7aa730 100644
--- a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.cpp
+++ b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.cpp
@@ -183,6 +183,14 @@ bool SndfileSink::open(const char* driver, const char* path) {
     return true;
 }
 
+ISink* SndfileSink::to_sink() {
+    return this;
+}
+
+ISource* SndfileSink::to_source() {
+    return NULL;
+}
+
 DeviceType SndfileSink::type() const {
     return DeviceType_Sink;
 }
diff --git a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.h b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.h
index 6f64d0e99..a23971e98 100644
--- a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.h
+++ b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.h
@@ -50,6 +50,12 @@ class SndfileSink : public ISink, public core::NonCopyable<> {
     //!  If @p driver or @p path are NULL, defaults are used.
     bool open(const char* driver, const char* path);
 
+    //! Cast IDevice to ISink.
+    virtual ISink* to_sink();
+
+    //! Cast IDevice to ISink.
+    virtual ISource* to_source();
+
     //! Get device type.
     virtual DeviceType type() const;
 
diff --git a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.cpp b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.cpp
index 1aab39f69..61f83210c 100644
--- a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.cpp
+++ b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.cpp
@@ -72,6 +72,14 @@ bool SndfileSource::open(const char* driver, const char* path) {
     return true;
 }
 
+ISink* SndfileSource::to_sink() {
+    return NULL;
+}
+
+ISource* SndfileSource::to_source() {
+    return this;
+}
+
 DeviceType SndfileSource::type() const {
     return DeviceType_Source;
 }
diff --git a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.h b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.h
index 1b430fcb1..d30211dc4 100644
--- a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.h
+++ b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_source.h
@@ -51,6 +51,12 @@ class SndfileSource : public ISource, private core::NonCopyable<> {
     //!  If @p driver or @p path are NULL, defaults are used.
     bool open(const char* driver, const char* path);
 
+    //! Cast IDevice to ISink.
+    virtual ISink* to_sink();
+
+    //! Cast IDevice to ISink.
+    virtual ISource* to_source();
+
     //! Get device type.
     virtual DeviceType type() const;