diff --git a/Misc/NEWS.d/next/Core and Builtins/2021-12-11-11-36-48.bpo-46045.sfThay.rst b/Misc/NEWS.d/next/Core and Builtins/2021-12-11-11-36-48.bpo-46045.sfThay.rst
new file mode 100644
index 00000000000..97fd1883eb2
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2021-12-11-11-36-48.bpo-46045.sfThay.rst	
@@ -0,0 +1 @@
+Do not use POSIX semaphores on NetBSD
diff --git a/configure b/configure
index 1dee645c387..7236e0930e1 100755
--- a/configure
+++ b/configure
@@ -13006,6 +13006,10 @@ $as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
       AIX/*)
 $as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
 
+		       ;;
+      NetBSD/*)
+$as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
+
 		       ;;
       esac
 
diff --git a/configure.ac b/configure.ac
index 7b084a264d4..aea12128c12 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3716,6 +3716,9 @@ if test "$posix_threads" = "yes"; then
       AIX/*) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
 		       [Define if the Posix semaphores do not work on your system])
 		       ;;
+      NetBSD/*) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
+		       [Define if the Posix semaphores do not work on your system])
+		       ;;
       esac
 
       AC_CACHE_CHECK([if PTHREAD_SCOPE_SYSTEM is supported], [ac_cv_pthread_system_supported],