Index: ./src/posix-lock-obj.h
===================================================================
--- ./src/posix-lock-obj.h
+++ ./src/posix-lock-obj.h
@@ -33,7 +33,14 @@
 #if USE_POSIX_THREADS
   union {
     pthread_mutex_t mtx;
-    long *dummy;
+#if defined (__sun) && !defined(_LP64)
+    double _xd_align;
+#elif defined (__hppa__)
+    long double _xld_align;
+#else
+    long _x_align;
+#endif
+    long *_xp_align;
   } u;
 #endif
 } _gpgrt_lock_t;