diff --git a/libexec/rtld-elf/ia64/reloc.c b/libexec/rtld-elf/ia64/reloc.c
index a45a19c40294..45f9ef54f590 100644
--- a/libexec/rtld-elf/ia64/reloc.c
+++ b/libexec/rtld-elf/ia64/reloc.c
@@ -564,7 +564,7 @@ init_pltgot(Obj_Entry *obj)
 	Elf_Addr *pltres = 0;
 
 	/*
-	 * When there are no PLT relocations, the DT_IA64_PLT_RESERVE entry
+	 * When there are no PLT relocations, the DT_IA_64_PLT_RESERVE entry
 	 * is bogus. Do not setup the BOR pointers in that case. An example
 	 * of where this happens is /usr/lib/libxpg4.so.3.
 	 */
@@ -575,12 +575,12 @@ init_pltgot(Obj_Entry *obj)
 	 * Find the PLT RESERVE section.
 	 */
 	for (dynp = obj->dynamic;  dynp->d_tag != DT_NULL;  dynp++) {
-		if (dynp->d_tag == DT_IA64_PLT_RESERVE)
+		if (dynp->d_tag == DT_IA_64_PLT_RESERVE)
 			pltres = (u_int64_t *)
 				(obj->relocbase + dynp->d_un.d_ptr);
 	}
 	if (!pltres)
-		errx(1, "Can't find DT_IA64_PLT_RESERVE entry");
+		errx(1, "Can't find DT_IA_64_PLT_RESERVE entry");
 
 	/*
 	 * The PLT RESERVE section is used to get values to pass to
diff --git a/sys/ia64/include/elf.h b/sys/ia64/include/elf.h
index 5d969b6e5d7a..880675ab3912 100644
--- a/sys/ia64/include/elf.h
+++ b/sys/ia64/include/elf.h
@@ -239,6 +239,6 @@ __ElfType(Auxinfo);
 
 /* Processor specific dynmamic section tags. */
 
-#define	DT_IA64_PLT_RESERVE	0x70000000
+#define	DT_IA_64_PLT_RESERVE	0x70000000
 
 #endif /* !_MACHINE_ELF_H_ */
diff --git a/usr.bin/elfdump/elfdump.c b/usr.bin/elfdump/elfdump.c
index baae63c552e2..2ddfc857c46f 100644
--- a/usr.bin/elfdump/elfdump.c
+++ b/usr.bin/elfdump/elfdump.c
@@ -232,7 +232,7 @@ d_tags(u_int64_t tag) {
 	case 0x6fffffff: return "DT_VERNEEDNUM";
 	case 0x6ffffff0: return "DT_GNU_VERSYM";
 	/* 0x70000000 - 0x7fffffff processor-specific semantics */
-	case 0x70000000: return "DT_IA64_PLT_RESERVE";
+	case 0x70000000: return "DT_IA_64_PLT_RESERVE";
 	case 0x7ffffffd: return "DT_SUNW_AUXILIARY";
 	case 0x7ffffffe: return "DT_SUNW_USED";
 	case 0x7fffffff: return "DT_SUNW_FILTER";