diff -Naur ZThread-2.2.10/src/posix/FastLock.h ZThread-2.2.10-gentoo/src/posix/FastLock.h
--- ZThread-2.2.10/src/posix/FastLock.h	2002-07-02 20:23:05.000000000 +0000
+++ ZThread-2.2.10-gentoo/src/posix/FastLock.h	2004-06-18 11:20:01.038016496 +0000
@@ -28,6 +28,7 @@
 #include "zthread/Exceptions.h"
 #include "zthread/NonCopyable.h"
 #include <pthread.h>
+#include <assert.h>
 
 namespace ZThread {
 
diff -Naur ZThread-2.2.10/tests/ReadWriteTests.cxx ZThread-2.2.10-gentoo/tests/ReadWriteTests.cxx
--- ZThread-2.2.10/tests/ReadWriteTests.cxx	2002-06-29 14:31:17.000000000 +0000
+++ ZThread-2.2.10-gentoo/tests/ReadWriteTests.cxx	2004-06-18 11:20:19.312238392 +0000
@@ -3,6 +3,7 @@
 #include "zthread/BiasedReadWriteLock.h"
 
 #include <iostream>
+#include <assert.h>
 using namespace std;
 using namespace ZThread;