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-rw-r--r--pci-arbiter/pci-ops.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/pci-arbiter/pci-ops.c b/pci-arbiter/pci-ops.c
index 72720832..ef27a3cd 100644
--- a/pci-arbiter/pci-ops.c
+++ b/pci-arbiter/pci-ops.c
@@ -128,7 +128,7 @@ S_pci_conf_read (struct protid * master, int reg, char **data,
/* Write `datalen' bytes from `data'. `amount' is updated. */
error_t
-S_pci_conf_write (struct protid * master, int reg, char *data, size_t datalen,
+S_pci_conf_write (struct protid * master, int reg, const char *data, size_t datalen,
mach_msg_type_number_t * amount)
{
error_t err;