diff --git a/indra/llcommon/llfasttimer_class.h b/indra/llcommon/llfasttimer_class.h
old mode 100644
new mode 100755
index 2a645315c9..4e59d4ab9d
--- a/indra/llcommon/llfasttimer_class.h
+++ b/indra/llcommon/llfasttimer_class.h
@@ -39,7 +39,7 @@ class LLMutex;
 #include "llsd.h"
 
 #if DEBUG_FAST_TIMER_THREADS
-void assert_main_thread();
+LL_COMMON_API void assert_main_thread();
 #endif
 
 class LL_COMMON_API LLFastTimer
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp
old mode 100644
new mode 100755
index f0b7ac5def..b4617c5453
--- a/indra/llcommon/llthread.cpp
+++ b/indra/llcommon/llthread.cpp
@@ -62,7 +62,7 @@ U32 ll_thread_local sThreadID = 0;
 
 U32 LLThread::sIDIter = 0;
 
-void assert_main_thread()
+LL_COMMON_API void assert_main_thread()
 {
 	static U32 s_thread_id = LLThread::currentID();
 	if (LLThread::currentID() != s_thread_id)