diff --git a/sysdeps/unix/sysv/linux/alpha/nptl/bits/pthreadtypes.h b/sysdeps/unix/sysv/linux/alpha/nptl/bits/pthreadtypes.h
index bd5ab9706c..2d8a00b93f 100644
--- a/sysdeps/unix/sysv/linux/alpha/nptl/bits/pthreadtypes.h
+++ b/sysdeps/unix/sysv/linux/alpha/nptl/bits/pthreadtypes.h
@@ -33,7 +33,7 @@
 
 /* Thread identifiers.  The structure of the attribute type is
    deliberately not exposed.  */
-typedef struct __opaque_pthread *pthread_t;
+typedef unsigned long int pthread_t;
 
 
 typedef union