diff --git a/src/h/config-internal.h.in b/src/h/config-internal.h.in
index f8196eca6..7a6228fb9 100644
--- a/src/h/config-internal.h.in
+++ b/src/h/config-internal.h.in
@@ -131,8 +131,6 @@
 #undef HAVE_SCHED_YIELD
 /* whether we have a working sem_init()                                 */
 #undef HAVE_SEM_INIT
-/* whether we have read/write locks                                     */
-#undef HAVE_POSIX_RWLOCK
 /* whether we have mutex lock operations with timeout                   */
 #undef HAVE_PTHREAD_MUTEX_TIMEDLOCK
 /* whether we can set the clock for timed waits on condition variables  */
diff --git a/src/h/config.h.in b/src/h/config.h.in
index 2ee7f42e9..dc554fe7c 100644
--- a/src/h/config.h.in
+++ b/src/h/config.h.in
@@ -235,6 +235,9 @@ typedef unsigned char ecl_base_char;
 /* wide-strings are available */
 #undef HAVE_WCHAR_H
 
+/* whether we have read/write locks                                     */
+#undef HAVE_POSIX_RWLOCK
+
 /*
  * C macros for inlining, denoting probable code paths and other stuff
  * that makes better code. Most of it is GCC specific.