diff --git a/src/bootloader/Makefile b/src/bootloader/Makefile
index 3105c34..9996e5e 100644
--- a/src/bootloader/Makefile
+++ b/src/bootloader/Makefile
@@ -20,7 +20,8 @@ else
 endif
 
 LIBS=-lc -lgcc
-
+CFLAGS += -DXCP_SIZE=4096
+		  
 CC=mipsel-elf-gcc
 LD=mipsel-elf-ld
 OBJDUMP=mipsel-elf-objdump
diff --git a/src/libsys/xcpt_asm.h b/src/libsys/xcpt_asm.h
index f6d3c07..7a454b6 100644
--- a/src/libsys/xcpt_asm.h
+++ b/src/libsys/xcpt_asm.h
@@ -15,7 +15,9 @@ symbol:		.frame	sp, 0, ra
 			.size	function, .-function
 
 /* Exception stack size */
+#ifndef XCP_SIZE
 #define	XCP_SIZE		32768
+#endif
 
 /* save location for registers */
 #define	XCP_SR			0