diff --git a/include/lib/aarch32/arch_helpers.h b/include/lib/aarch32/arch_helpers.h
index 6369a5d..5d9c1c1 100644
--- a/include/lib/aarch32/arch_helpers.h
+++ b/include/lib/aarch32/arch_helpers.h
@@ -210,7 +210,12 @@
 DEFINE_SYSOP_TYPE_FUNC(dsb, sy)
 DEFINE_SYSOP_TYPE_FUNC(dmb, sy)
 DEFINE_SYSOP_TYPE_FUNC(dmb, st)
+
+/* dmb ld is not valid for armv7/thumb machines */
+#if ARM_ARCH_MAJOR != 7
 DEFINE_SYSOP_TYPE_FUNC(dmb, ld)
+#endif
+
 DEFINE_SYSOP_TYPE_FUNC(dsb, ish)
 DEFINE_SYSOP_TYPE_FUNC(dsb, ishst)
 DEFINE_SYSOP_TYPE_FUNC(dmb, ish)
@@ -323,6 +328,11 @@
 #define dsb()			dsbsy()
 #define dmb()			dmbsy()
 
+/* dmb ld is not valid for armv7/thumb machines, so alias it to dmb */
+#if ARM_ARCH_MAJOR == 7
+#define	dmbld()			dmb()
+#endif
+
 #define IS_IN_SECURE() \
 	(GET_NS_BIT(read_scr()) == 0)