diff --git a/m4/ost_pthread.m4 b/m4/ost_pthread.m4
index 624f134..d9ee454 100644
--- a/m4/ost_pthread.m4
+++ b/m4/ost_pthread.m4
@@ -181,16 +181,28 @@ AC_DEFUN([OST_LIB_PTHREAD],
     #       ])
     #   fi
         ost_cv_thread_library=none
-        AC_CHECK_LIB(pthread, pthread_self,
-            ost_cv_thread_library=pthread,
-            AC_CHECK_LIB(c_r, pthread_self,
-                ost_cv_thread_library=c_r,
-                AC_CHECK_LIB(pthread, pthread_kill,
-                    ost_cv_thread_library=pthread,
-                    AC_CHECK_LIB(pthreads, pthread_self,
-                        ost_cv_thread_library=pthreads,
-                        AC_CHECK_LIB(thread, pthread_self,
-                            ost_cv_thread_library=thread)))))
+        AC_CHECK_LIB([pthread], [pthread_self],
+            [ost_cv_thread_library=pthread])
+
+        if test $ost_cv_thread_library = none ; then
+            AC_CHECK_LIB([c_r], [pthread_self],
+                [ost_cv_thread_library=c_r])
+        fi
+
+        if test $ost_cv_thread_library = none ; then
+            AC_CHECK_LIB([pthread], [pthread_kill],
+                [ost_cv_thread_library=pthread])
+        fi
+
+        if test $ost_cv_thread_library = none ; then
+            AC_CHECK_LIB([pthreads], [pthread_self],
+                [ost_cv_thread_library=pthreads])
+        fi
+
+        if test $ost_cv_thread_library = none ; then
+            AC_CHECK_LIB([thread], [pthread_self],
+                [ost_cv_thread_library=thread])
+        fi
 
         if test $ost_cv_thread_library = none ; then
             AC_CHECK_LIB(gthreads, pthread_self,[