diff --git a/scripts/ax_pthread.m4 b/scripts/ax_pthread.m4
index e20a388c..27f2533c 100644
--- a/scripts/ax_pthread.m4
+++ b/scripts/ax_pthread.m4
@@ -123,7 +123,7 @@ fi
 # which indicates that we try without any flags at all, and "pthread-config"
 # which is a program returning the flags for the Pth emulation library.
 
-ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+ax_pthread_flags="none pthreads -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
 
 # The ordering *is* (sometimes) important.  Some notes on the
 # individual items follow:
@@ -160,7 +160,7 @@ case "${host_cpu}-${host_os}" in
         ;;
 
         *-darwin*)
-        ax_pthread_flags="-pthread $ax_pthread_flags"
+        ax_pthread_flags="none -pthread $ax_pthread_flags"
         ;;
 esac