diff --git a/configure.in b/configure.in
index efe48039d..1118438b7 100644
--- a/configure.in
+++ b/configure.in
@@ -1021,9 +1021,13 @@ case "$with_threads" in
       with_threads="pthreads",
       with_threads="null")
 
+    # Reasons for testing:
+    #     pthread_getattr_np - "np" meaning "non portable" says it
+    #         all; not present on MacOS X or Solaris 10
+    #
     old_CFLAGS="$CFLAGS"
     CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
-    AC_CHECK_FUNCS(pthread_attr_getstack)
+    AC_CHECK_FUNCS(pthread_attr_getstack pthread_getattr_np)
     CFLAGS="$old_CFLAGS"
 
     # On Solaris, sched_yield lives in -lrt.