diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
--- a/libexec/rtld-elf/rtld.c
+++ b/libexec/rtld-elf/rtld.c
@@ -493,7 +493,7 @@
 func_ptr_type
 _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
 {
-	Elf_Auxinfo *aux, *auxp, *auxpf, *aux_info[AT_COUNT];
+	Elf_Auxinfo *aux, *auxp, *auxpf, *aux_info[AT_COUNT], auxtmp;
 	Objlist_Entry *entry;
 	Obj_Entry *last_interposer, *obj, *preload_tail;
 	const Elf_Phdr *phdr;
@@ -670,7 +670,9 @@
 				 * present
 				 */
 				for (;; auxp++, auxpf++) {
-					*auxp = *auxpf;
+					/* NB: overlap if rtld_argc is 1 */
+					auxtmp = *auxpf;
+					*auxp = auxtmp;
 					if (auxp->a_type == AT_NULL)
 						break;
 				}