diff --git a/usr.bin/truss/amd64-linux32.c b/usr.bin/truss/amd64-linux32.c
index f392a4bd6308..3de40dabedb7 100644
--- a/usr.bin/truss/amd64-linux32.c
+++ b/usr.bin/truss/amd64-linux32.c
@@ -228,7 +228,7 @@ amd64_linux32_syscall_entry(struct trussinfo *trussinfo, int nargs) {
 /*
  * Linux syscalls return negative errno's, we do positive and map them
  */
-const int bsd_to_linux_errno[] = {
+static const int bsd_to_linux_errno[] = {
   	-0,  -1,  -2,  -3,  -4,  -5,  -6,  -7,  -8,  -9,
  	-10, -35, -12, -13, -14, -15, -16, -17, -18, -19,
  	-20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
diff --git a/usr.bin/truss/i386-linux.c b/usr.bin/truss/i386-linux.c
index 8e0aa049ea8f..66bccf990a0a 100644
--- a/usr.bin/truss/i386-linux.c
+++ b/usr.bin/truss/i386-linux.c
@@ -228,7 +228,7 @@ i386_linux_syscall_entry(struct trussinfo *trussinfo, int nargs) {
 /*
  * Linux syscalls return negative errno's, we do positive and map them
  */
-const int bsd_to_linux_errno[] = {
+static const int bsd_to_linux_errno[] = {
   	-0,  -1,  -2,  -3,  -4,  -5,  -6,  -7,  -8,  -9,
  	-10, -35, -12, -13, -14, -15, -16, -17, -18, -19,
  	-20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
diff --git a/usr.bin/truss/main.c b/usr.bin/truss/main.c
index a74fe1c5e7e8..e04e81056092 100644
--- a/usr.bin/truss/main.c
+++ b/usr.bin/truss/main.c
@@ -74,7 +74,7 @@ usage(void)
  * WARNING! "FreeBSD a.out" must be first, or set_etype will not
  * work correctly.
  */
-struct ex_types {
+static struct ex_types {
 	const char *type;
 	void (*enter_syscall)(struct trussinfo *, int);
 	long (*exit_syscall)(struct trussinfo *, int);
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index f19553d21674..bcdc6cefc336 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -89,7 +89,7 @@ static const char rcsid[] =
 /*
  * This should probably be in its own file, sorted alphabetically.
  */
-struct syscall syscalls[] = {
+static struct syscall syscalls[] = {
 	{ .name = "fcntl", .ret_type = 1, .nargs = 3,
 	  .args = { { Int, 0 } , { Fcntl, 1 }, { Fcntlflag | OUT, 2 } } },
 	{ .name = "fork", .ret_type = 1, .nargs = 0 },
@@ -283,7 +283,7 @@ static struct xlat kevent_flags[] = {
 	X(EV_CLEAR) X(EV_FLAG1) X(EV_ERROR) X(EV_EOF) XEND
 };
 
-struct xlat poll_flags[] = {
+static struct xlat poll_flags[] = {
 	X(POLLSTANDARD) X(POLLIN) X(POLLPRI) X(POLLOUT) X(POLLERR)
 	X(POLLHUP) X(POLLNVAL) X(POLLRDNORM) X(POLLRDBAND)
 	X(POLLWRBAND) X(POLLINIGNEOF) XEND