diff --git a/source/core/StarThread_unix.cpp b/source/core/StarThread_unix.cpp
index 30f42f8..7d255f4 100644
--- a/source/core/StarThread_unix.cpp
+++ b/source/core/StarThread_unix.cpp
@@ -136,7 +136,7 @@ struct MutexImpl {
     ts.tv_sec += 60;
     if (pthread_mutex_timedlock(&mutex, &ts) != 0) {
       Logger::warn("Mutex lock is taking too long, printing stack");
-      printStack();
+      printStack("Mutex::lock");
       pthread_mutex_lock(&mutex);
     }
   }
@@ -211,7 +211,7 @@ struct RecursiveMutexImpl {
     ts.tv_sec += 60;
     if (pthread_mutex_timedlock(&mutex, &ts) != 0) {
       Logger::warn("RecursiveMutex lock is taking too long, printing stack");
-      printStack();
+      printStack("RecursiveMutex::lock");
       pthread_mutex_lock(&mutex);
     }
   }