diff --git a/sysdeps/unix/alpha/sysdep.S b/sysdeps/unix/alpha/sysdep.S
index 50c84c1166..4c7c134333 100644
--- a/sysdeps/unix/alpha/sysdep.S
+++ b/sysdeps/unix/alpha/sysdep.S
@@ -45,7 +45,7 @@
 	.ent __syscall_error
 __syscall_error:
 
-#if defined(_LIBC_REENTRANT) && defined(USE___THREAD)
+#if defined(_LIBC_REENTRANT) && USE___THREAD
 
 	LOADGP
 	PROLOGUE