diff --git a/board/esd/cpci405/cpci405.c b/board/esd/cpci405/cpci405.c
index 1b90d05..bbae87b 100644
--- a/board/esd/cpci405/cpci405.c
+++ b/board/esd/cpci405/cpci405.c
@@ -54,7 +54,7 @@
 
 /* Prototypes */
 int cpci405_version(void);
-int gunzip(void *, int, unsigned char *, int *);
+int gunzip(void *, int, unsigned char *, unsigned long *);
 
 
 int board_early_init_f (void)
@@ -259,7 +259,7 @@
 		mtdcr(cntrl0, cntrl0Reg | 0x00300000);
 
 		dst = malloc(CFG_FPGA_MAX_SIZE);
-		if (gunzip (dst, CFG_FPGA_MAX_SIZE, (uchar *)fpgadata, (int *)&len) != 0) {
+		if (gunzip (dst, CFG_FPGA_MAX_SIZE, (uchar *)fpgadata, &len) != 0) {
 			printf ("GUNZIP ERROR - must RESET board to recover\n");
 			do_reset (NULL, 0, 0, NULL);
 		}