diff --git a/arch/arm64/src/Toolchain.defs b/arch/arm64/src/Toolchain.defs
index 162d4fd411695..21d86823c5b8b 100644
--- a/arch/arm64/src/Toolchain.defs
+++ b/arch/arm64/src/Toolchain.defs
@@ -97,6 +97,10 @@ ifeq ($(CONFIG_ARCH_FPU),y)
   ARCHCFLAGS   += -D_LDBL_EQ_DBL
 endif
 
+ifeq ($(CONFIG_IMX9_BOOTLOADER),y)
+ARCHCFLAGS +=  -mstrict-align
+endif
+
 ARCHCFLAGS += -fno-common
 ARCHCXXFLAGS += -fno-common