diff --git a/pack.c b/pack.c
index d5b78b6060..4fdaf7fd89 100644
--- a/pack.c
+++ b/pack.c
@@ -36,10 +36,11 @@
  */
 #ifdef HAVE_TRUE_LONG_LONG
 static const char natstr[] = "sSiIlLqQjJ";
+# define endstr natstr
 #else
 static const char natstr[] = "sSiIlLjJ";
-#endif
 static const char endstr[] = "sSiIlLqQjJ";
+#endif
 
 #ifdef HAVE_TRUE_LONG_LONG
 /* It is intentional to use long long instead of LONG_LONG. */