3 files changed, 3 insertions, 3 deletions
diff --git a/fastos/src/vespa/fastos/thread.h b/fastos/src/vespa/fastos/thread.h
index b3627d99d31..95737e9d079 100644
--- a/fastos/src/vespa/fastos/thread.h
+++ b/fastos/src/vespa/fastos/thread.h
@@ -381,7 +381,7 @@ public:
     /**
      * Returns the id of this thread.
      */
-    virtual FastOS_ThreadId GetThreadId ()=0;
+    virtual FastOS_ThreadId GetThreadId () const noexcept = 0;
 };
 
 
diff --git a/fastos/src/vespa/fastos/unix_thread.cpp b/fastos/src/vespa/fastos/unix_thread.cpp
index a45d90426ef..aac4c4d189c 100644
--- a/fastos/src/vespa/fastos/unix_thread.cpp
+++ b/fastos/src/vespa/fastos/unix_thread.cpp
@@ -102,7 +102,7 @@ FastOS_UNIX_Thread::~FastOS_UNIX_Thread()
     }
 }
 
-FastOS_ThreadId FastOS_UNIX_Thread::GetThreadId ()
+FastOS_ThreadId FastOS_UNIX_Thread::GetThreadId () const noexcept
 {
     return _handle;
 }
diff --git a/fastos/src/vespa/fastos/unix_thread.h b/fastos/src/vespa/fastos/unix_thread.h
index 18e840183cb..b2f666060ca 100644
--- a/fastos/src/vespa/fastos/unix_thread.h
+++ b/fastos/src/vespa/fastos/unix_thread.h
@@ -36,7 +36,7 @@ public:
 
     ~FastOS_UNIX_Thread();
 
-    FastOS_ThreadId GetThreadId () override;
+    FastOS_ThreadId GetThreadId () const noexcept override;
     static bool CompareThreadIds (FastOS_ThreadId a, FastOS_ThreadId b);
     static FastOS_ThreadId GetCurrentThreadId ();
 };