diff --git a/man2/pciconfig_read.2 b/man2/pciconfig_read.2
index cec6f58e9..c379e2d3b 100644
--- a/man2/pciconfig_read.2
+++ b/man2/pciconfig_read.2
@@ -13,11 +13,13 @@ pciconfig_read, pciconfig_write, pciconfig_iobase \- pci device information hand
 .B #include <pci.h>
 .PP
 .BI "int pciconfig_read(unsigned long " bus ", unsigned long " dfn ,
-.BI "          unsigned long " off ", unsigned long " len ", void *" buf );
+.BI "                   unsigned long " off ", unsigned long " len ,
+.BI "                   unsigned char *" buf );
 .BI "int pciconfig_write(unsigned long " bus ", unsigned long " dfn ,
-.BI "          unsigned long " off ", unsigned long " len ", void *" buf );
-.BI "int pciconfig_iobase(long " which ", unsigned long " bus ,
-.BI "          unsigned long " devfn );
+.BI "                   unsigned long " off ", unsigned long " len ,
+.BI "                   unsgined char *" buf );
+.BI "int pciconfig_iobase(int " which ", unsigned long " bus ,
+.BI "                   unsigned long " devfn );
 .fi
 .SH DESCRIPTION
 Most of the interaction with PCI devices is already handled by the