diff --git a/sys/amd64/include/pci_cfgreg.h b/sys/amd64/include/pci_cfgreg.h
index 75882821bfe..0358e791939 100644
--- a/sys/amd64/include/pci_cfgreg.h
+++ b/sys/amd64/include/pci_cfgreg.h
@@ -37,6 +37,7 @@
 #define CONF1_ENABLE_MSK1  0x80000001ul
 #define CONF1_ENABLE_RES1  0x80000000ul
 
+u_long		hostb_alloc_start(int type, u_long start, u_long end, u_long count);
 int		pcie_cfgregopen(uint64_t base, uint8_t minbus, uint8_t maxbus);
 int		pci_cfgregopen(void);
 u_int32_t	pci_cfgregread(int bus, int slot, int func, int reg, int bytes);
diff --git a/sys/i386/include/pci_cfgreg.h b/sys/i386/include/pci_cfgreg.h
index bc72418d312..6995971c69c 100644
--- a/sys/i386/include/pci_cfgreg.h
+++ b/sys/i386/include/pci_cfgreg.h
@@ -43,6 +43,7 @@
 #define CONF2_ENABLE_CHK   0x0e
 #define CONF2_ENABLE_RES   0x0e
 
+u_long		hostb_alloc_start(int type, u_long start, u_long end, u_long count);
 int		pcie_cfgregopen(uint64_t base, uint8_t minbus, uint8_t maxbus);
 int		pci_cfgregopen(void);
 u_int32_t	pci_cfgregread(int bus, int slot, int func, int reg, int bytes);