diff --git a/gcc/config/aarch64/falkor-tag-collision-avoidance.c b/gcc/config/aarch64/falkor-tag-collision-avoidance.c
index a96a3320e8fc..a119e2b8f258 100644
--- a/gcc/config/aarch64/falkor-tag-collision-avoidance.c
+++ b/gcc/config/aarch64/falkor-tag-collision-avoidance.c
@@ -740,7 +740,7 @@ dump_insn_list (const rtx &t, const insn_info_list_t &insn_info,
 		void *unused ATTRIBUTE_UNUSED)
 {
   gcc_assert (dump_file);
-  fprintf (dump_file, "Tag 0x%lx ::\n", INTVAL (t));
+  fprintf (dump_file, "Tag 0x%lx ::\n", (long unsigned int)INTVAL (t));
 
   for (unsigned i = 0; i < insn_info.length (); i++)
     dump_insn_slim (dump_file, insn_info[i]->insn);