diff --git a/src/ia64/Gtables-ia64.c b/src/ia64/Gtables-ia64.c
index 0f2cb6ce..fedfd90e 100644
--- a/src/ia64/Gtables-ia64.c
+++ b/src/ia64/Gtables-ia64.c
@@ -398,7 +398,7 @@ get_kernel_table (unw_dyn_info_t *di)
   ktab = sos_alloc (size);
   if (!ktab)
     {
-      dprintf (__FILE__".%s: failed to allocate %Zu bytes",
+      dprintf (__FILE__".%s: failed to allocate %zu bytes",
 	       __FUNCTION__, size);
       return -UNW_ENOMEM;
     }