diff --git a/drm/mediacas/plugins/clearkey/ClearKeySessionLibrary.h b/drm/mediacas/plugins/clearkey/ClearKeySessionLibrary.h
index a537e63..7c6d86c 100644
--- a/drm/mediacas/plugins/clearkey/ClearKeySessionLibrary.h
+++ b/drm/mediacas/plugins/clearkey/ClearKeySessionLibrary.h
@@ -22,7 +22,6 @@
 #include <openssl/aes.h>
 #include <utils/KeyedVector.h>
 #include <utils/Mutex.h>
-#include <utils/RefBase.h>
 
 namespace android {
 struct ABuffer;
@@ -30,7 +29,7 @@
 namespace clearkeycas {
 class KeyFetcher;
 
-class ClearKeyCasSession : public RefBase {
+class ClearKeyCasSession {
 public:
     explicit ClearKeyCasSession(CasPlugin *plugin);