diff -ur pdns-2.9.22.orig/pdns/unix_semaphore.cc pdns-2.9.22/pdns/unix_semaphore.cc
--- pdns-2.9.22.orig/pdns/unix_semaphore.cc	2010-12-14 17:18:02.667000233 +0100
+++ pdns-2.9.22/pdns/unix_semaphore.cc	2010-12-14 17:18:08.138000485 +0100
@@ -156,7 +156,11 @@
 
 int Semaphore::wait()
 {
-  return sem_wait(m_pSemaphore);
+  int ret;
+  do
+    ret = sem_wait(m_pSemaphore);
+  while (ret == -1 && errno == EINTR);
+  return ret;
 }
 int Semaphore::tryWait()
 {