Index: sys/compat/linux/linux_vdso.h
===================================================================
--- sys/compat/linux/linux_vdso.h
+++ sys/compat/linux/linux_vdso.h
@@ -41,7 +41,7 @@
 vm_object_t __elfN(linux_shared_page_init)(char **);
 void	__elfN(linux_shared_page_fini)(vm_object_t);
 void	__elfN(linux_vdso_fixup)(struct sysentvec *);
-void	__elfN(linux_vdso_reloc)(struct sysentvec *, int);
+void	__elfN(linux_vdso_reloc)(struct sysentvec *, long);
 void	__elfN(linux_vdso_sym_init)(struct linux_vdso_sym *);
 
 #define	LINUX_VDSO_SYM_INTPTR(name)				\
Index: sys/compat/linux/linux_vdso.c
===================================================================
--- sys/compat/linux/linux_vdso.c
+++ sys/compat/linux/linux_vdso.c
@@ -29,7 +29,11 @@
 
 #include "opt_compat.h"
 
+#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 #define	__ELF_WORD_SIZE	32
+#else
+#define	__ELF_WORD_SIZE	64
+#endif
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -135,7 +139,7 @@
 }
 
 void
-__elfN(linux_vdso_reloc)(struct sysentvec *sv, int vdso_adjust)
+__elfN(linux_vdso_reloc)(struct sysentvec *sv, long vdso_adjust)
 {
 	struct linux_vdso_sym *lsym;
 	Elf_Ehdr *ehdr;