diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 1557aa540cd91ad0aef344f7694d6b501d4afcbe..28232a77e6b490ff9132d4f31ad02d5ec7ef57b2 100644
--- a/src/conf/sysconf.c
+++ b/src/conf/sysconf.c
@@ -82,7 +82,7 @@ long sysconf(int name)
 		[_SC_LOGIN_NAME_MAX] = 256,
 		[_SC_TTY_NAME_MAX] = TTY_NAME_MAX,
 		[_SC_THREAD_DESTRUCTOR_ITERATIONS] = _POSIX_THREAD_DESTRUCTOR_ITERATIONS,
-		[_SC_THREAD_KEYS_MAX] = -1,
+		[_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX,
 		[_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN,
 		[_SC_THREAD_THREADS_MAX] = -1,
 		[_SC_THREAD_ATTR_STACKADDR] = -1,