diff --git a/board/esd/ash405/ash405.c b/board/esd/ash405/ash405.c
index 22b3828..012505e 100644
--- a/board/esd/ash405/ash405.c
+++ b/board/esd/ash405/ash405.c
@@ -47,7 +47,7 @@
 
 
 /* Prototypes */
-int gunzip(void *, int, unsigned char *, int *);
+int gunzip(void *, int, unsigned char *, unsigned long *);
 
 
 int board_early_init_f (void)
@@ -102,7 +102,7 @@
 	int i;
 
 	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);
 	}
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);
 		}
diff --git a/board/esd/pci405/pci405.c b/board/esd/pci405/pci405.c
index 44bfe10..05f59a8 100644
--- a/board/esd/pci405/pci405.c
+++ b/board/esd/pci405/pci405.c
@@ -50,7 +50,7 @@
 
 
 /* Prototypes */
-int gunzip(void *, int, unsigned char *, int *);
+int gunzip(void *, int, unsigned char *, unsigned long *);
 
 
 int board_early_init_f (void)
@@ -116,7 +116,7 @@
 	 */
 
 	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);
 	}
diff --git a/board/esd/plu405/plu405.c b/board/esd/plu405/plu405.c
index ebefa67..04f386f 100644
--- a/board/esd/plu405/plu405.c
+++ b/board/esd/plu405/plu405.c
@@ -47,7 +47,7 @@
 
 
 /* Prototypes */
-int gunzip(void *, int, unsigned char *, int *);
+int gunzip(void *, int, unsigned char *, unsigned long *);
 
 
 int board_early_init_f (void)
@@ -101,7 +101,7 @@
 
 #if 1 /* test-only */
 	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);
 	}
diff --git a/board/esd/voh405/voh405.c b/board/esd/voh405/voh405.c
index d62c570..d73db40 100644
--- a/board/esd/voh405/voh405.c
+++ b/board/esd/voh405/voh405.c
@@ -47,7 +47,7 @@
 
 
 /* Prototypes */
-int gunzip(void *, int, unsigned char *, int *);
+int gunzip(void *, int, unsigned char *, unsigned long *);
 
 
 int board_early_init_f (void)
@@ -102,7 +102,7 @@
 	int i;
 
 	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);
 	}