diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 377f503f3a23..1ba97dbe1d66 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -144,7 +144,7 @@ if ARM_DMA_USE_IOMMU
 config ARM_DMA_IOMMU_ALIGNMENT
 	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
 	range 4 9
-	default 8
+	default 9
 	help
 	  DMA mapping framework by default aligns all buffers to the smallest
 	  PAGE_SIZE order which is greater than or equal to the requested buffer