diff --git a/src/thread/pithread.cpp b/src/thread/pithread.cpp
index d2774e0d..060fb861 100755
--- a/src/thread/pithread.cpp
+++ b/src/thread/pithread.cpp
@@ -137,7 +137,7 @@ bool PIThread::start(int timer_delay) {
 	pthread_attr_destroy(&attr);
 	if (ret == 0) {
 #  ifdef MAC_OS
-		pthread_threadid_np(thread, (__uint64_t*)&tid_)
+		pthread_threadid_np(thread, (__uint64_t*)&tid_);
 #  else
 		tid_ = thread;
 #  endif
@@ -173,7 +173,7 @@ bool PIThread::startOnce() {
 	pthread_attr_destroy(&attr);
 	if (ret == 0) {
 #  ifdef MAC_OS
-		pthread_threadid_np(thread, (__uint64_t*)&tid_)
+		pthread_threadid_np(thread, (__uint64_t*)&tid_);
 #  else
 		tid_ = thread;
 #  endif