diff --git a/sys/compat/linux/linux_vdso.c b/sys/compat/linux/linux_vdso.c
index 871a5daa5b84..5ab0ee641617 100644
--- a/sys/compat/linux/linux_vdso.c
+++ b/sys/compat/linux/linux_vdso.c
@@ -29,7 +29,11 @@ __FBSDID("$FreeBSD$");
 
 #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 @@ __elfN(linux_vdso_fixup)(struct sysentvec *sv)
 }
 
 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;
diff --git a/sys/compat/linux/linux_vdso.h b/sys/compat/linux/linux_vdso.h
index a3ee63de5ce4..e11ee8ad07b0 100644
--- a/sys/compat/linux/linux_vdso.h
+++ b/sys/compat/linux/linux_vdso.h
@@ -41,7 +41,7 @@ struct linux_vdso_sym {
 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)				\