diff --git a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h
index 560da0b292..6fa8825b49 100644
--- a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h
+++ b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_cpu.h
@@ -95,7 +95,7 @@ enum bcm63xx_regs_set {
 #define RSET_ENET_SIZE			2048
 #define RSET_ENETDMA_SIZE		2048
 #define RSET_UART_SIZE			24
-#define RSET_SPI_SIZE			2048
+#define RSET_SPI_SIZE			256
 #define RSET_UDC_SIZE			256
 #define RSET_OHCI_SIZE			256
 #define RSET_EHCI_SIZE			256