diff --git a/src/add-ons/kernel/bus_managers/firewire/fwohcireg.h b/src/add-ons/kernel/bus_managers/firewire/fwohcireg.h
index beb189ec29..9955282986 100644
--- a/src/add-ons/kernel/bus_managers/firewire/fwohcireg.h
+++ b/src/add-ons/kernel/bus_managers/firewire/fwohcireg.h
@@ -95,6 +95,7 @@ typedef uint32_t 	fwohcireg_t;
 #if BYTE_ORDER == BIG_ENDIAN
 #ifdef __HAIKU__
 #define htole32(x) __swap_int32(x)
+#define letoh32(x) __swap_int32(x)
 #endif
 #define FWOHCI_DMA_WRITE(x, y)	((x) = htole32(y))
 #define FWOHCI_DMA_READ(x)	le32toh(x)