diff --git a/lib/aarch32/misc_helpers.S b/lib/aarch32/misc_helpers.S
index 77cf6cd..6d2ec1c 100644
--- a/lib/aarch32/misc_helpers.S
+++ b/lib/aarch32/misc_helpers.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -171,6 +171,10 @@
 func disable_mmu_secure
 	mov	r1, #(SCTLR_M_BIT | SCTLR_C_BIT)
 do_disable_mmu:
+#if ERRATA_A9_794073
+	stcopr	r0, BPIALL
+	dsb
+#endif
 	ldcopr	r0, SCTLR
 	bic	r0, r0, r1
 	stcopr	r0, SCTLR