diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c
index b784368f09e4..27047cb62689 100644
--- a/sys/amd64/amd64/vm_machdep.c
+++ b/sys/amd64/amd64/vm_machdep.c
@@ -522,8 +522,7 @@ swi_vm(void *dummy)
  */
 
 int
-is_physical_memory(addr)
-	vm_offset_t addr;
+is_physical_memory(vm_paddr_t addr)
 {
 
 #ifdef DEV_ISA
diff --git a/sys/amd64/include/md_var.h b/sys/amd64/include/md_var.h
index d1c3a40eba89..38c18b63d83c 100644
--- a/sys/amd64/include/md_var.h
+++ b/sys/amd64/include/md_var.h
@@ -66,7 +66,7 @@ void	doreti_iret_fault(void) __asm(__STRING(doreti_iret_fault));
 void	enable_sse(void);
 void	fillw(int /*u_short*/ pat, void *base, size_t cnt);
 void	fpstate_drop(struct thread *td);
-int	is_physical_memory(vm_offset_t addr);
+int	is_physical_memory(vm_paddr_t addr);
 int	isa_nmi(int cd);
 void	pagecopy(void *from, void *to);
 void	pagezero(void *addr);
diff --git a/sys/i386/i386/vm_machdep.c b/sys/i386/i386/vm_machdep.c
index 06e4ed41d56f..0f1fd68370c8 100644
--- a/sys/i386/i386/vm_machdep.c
+++ b/sys/i386/i386/vm_machdep.c
@@ -691,8 +691,7 @@ swi_vm(void *dummy)
  */
 
 int
-is_physical_memory(addr)
-	vm_offset_t addr;
+is_physical_memory(vm_paddr_t addr)
 {
 
 #ifdef DEV_ISA
diff --git a/sys/i386/include/md_var.h b/sys/i386/include/md_var.h
index 61da35981798..42bc19a15e42 100644
--- a/sys/i386/include/md_var.h
+++ b/sys/i386/include/md_var.h
@@ -95,7 +95,7 @@ int	i586_copyout(const void *kaddr, void *udaddr, size_t len);
 void	i686_pagezero(void *addr);
 void	sse2_pagezero(void *addr);
 void	init_AMD_Elan_sc520(void);
-int	is_physical_memory(vm_offset_t addr);
+int	is_physical_memory(vm_paddr_t addr);
 int	isa_nmi(int cd);
 vm_paddr_t kvtop(void *addr);
 void	setidt(int idx, alias_for_inthand_t *func, int typ, int dpl, int selec);