diff --git a/libguile/threads.c b/libguile/threads.c
index 99a2b28e1..428133d8a 100644
--- a/libguile/threads.c
+++ b/libguile/threads.c
@@ -571,7 +571,8 @@ scm_i_init_thread_for_guile (SCM_STACKITEM *base, SCM parent)
 }
 
 #if SCM_USE_PTHREAD_THREADS
-#ifdef HAVE_PTHREAD_ATTR_GETSTACK
+/* pthread_getattr_np not available on MacOS X and Solaris 10. */
+#if HAVE_PTHREAD_ATTR_GETSTACK && HAVE_PTHREAD_GETATTR_NP
 
 #define HAVE_GET_THREAD_STACK_BASE
 
@@ -605,7 +606,7 @@ get_thread_stack_base ()
     }
 }
 
-#endif /* HAVE_PTHREAD_ATTR_GETSTACK */
+#endif /* HAVE_PTHREAD_ATTR_GETSTACK && HAVE_PTHREAD_GETATTR_NP */
 
 #else /* !SCM_USE_PTHREAD_THREADS */