diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index bd7261e..759f49d 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -58,6 +58,9 @@
 	bool
 	default y
 
+config NEED_DMA_MAP_STATE
+       def_bool y
+
 config GENERIC_ISA_DMA
 	bool
 	default y