diff --git a/server/src/client/shared/WhisperHandler.cpp b/server/src/client/shared/WhisperHandler.cpp
index be8e7e2..ebb76c2 100644
--- a/server/src/client/shared/WhisperHandler.cpp
+++ b/server/src/client/shared/WhisperHandler.cpp
@@ -172,6 +172,7 @@ void WhisperHandler::handle_session_reset() {
     this->session_state = SessionState::Uninitialized;
     if(this->whisper_head_ptr) {
         ::free(this->whisper_head_ptr);
+        this->whisper_head_ptr = nullptr;
         this->whisper_head_capacity = 0;
         this->whisper_head_length = 0;
     }