diff --git a/src/osal/task/pthread/autolock.cpp b/src/osal/task/pthread/autolock.cpp
index 6f4f1691c9ac95f75738da16597a4b24f559afd8..5a5c382583dde444cdfd19ecf906793cca5608a0 100644
--- a/src/osal/task/pthread/autolock.cpp
+++ b/src/osal/task/pthread/autolock.cpp
@@ -21,7 +21,9 @@ namespace OHOS {
 namespace Media {
 AutoLock::AutoLock(Mutex& mutex) : mutex_(&mutex)
 {
-    mutex_->lock();
+    if (mutex_ != nullptr) {
+        mutex_->lock();
+    }
 }
 
 AutoLock::~AutoLock()