diff --git a/mcp6x_spi.c b/mcp6x_spi.c
index 7444631..5d9135f 100644
--- a/mcp6x_spi.c
+++ b/mcp6x_spi.c
@@ -24,6 +24,7 @@
 #include "flash.h"
 #include "programmer.h"
 #include "hwaccess.h"
+#include "hwaccess_physmap.h"
 #include "platform/pci.h"
 
 /* Bit positions for each pin. */