diff --git a/services/tuner/TunerDemux.cpp b/services/tuner/TunerDemux.cpp
index 8346992..ba8d6a7 100644
--- a/services/tuner/TunerDemux.cpp
+++ b/services/tuner/TunerDemux.cpp
@@ -222,6 +222,8 @@
     }
 
     Result res = mDemux->close();
+    mDemux = NULL;
+
     if (res != Result::SUCCESS) {
         return Status::fromServiceSpecificError(static_cast<int32_t>(res));
     }