diff --git a/usr.bin/du/du.1 b/usr.bin/du/du.1
--- a/usr.bin/du/du.1
+++ b/usr.bin/du/du.1
@@ -137,7 +137,7 @@
 Use unit suffixes: Byte, Kilobyte, Megabyte,
 Gigabyte, Terabyte and Petabyte based on powers of 1000.
 .It Fl t Ar threshold
-Display only entries for which size exceeds
+Exclude entries smaller than
 .Ar threshold .
 If
 .Ar threshold
diff --git a/usr.bin/du/du.c b/usr.bin/du/du.c
--- a/usr.bin/du/du.c
+++ b/usr.bin/du/du.c
@@ -320,7 +320,9 @@
 			    howmany(p->fts_statp->st_size, cblocksize) :
 			    howmany(p->fts_statp->st_blocks, cblocksize);
 
-			if (aflag || p->fts_level == 0) {
+			if ((aflag || p->fts_level == 0) && threshold <=
+			    threshold_sign * howmany(curblocks * cblocksize,
+			    blocksize)) {
 				if (hflag > 0) {
 					prthumanval(curblocks);
 					(void)printf("\t%s\n", p->fts_path);
diff --git a/usr.bin/du/tests/du_test.sh b/usr.bin/du/tests/du_test.sh
--- a/usr.bin/du/tests/du_test.sh
+++ b/usr.bin/du/tests/du_test.sh
@@ -176,6 +176,23 @@
 	atf_check -o inline:'1.5M\tA\n1.6M\tB\n' du -A --si A B
 }
 
+atf_test_case a_t_flags
+a_t_flags_head()
+{
+	atf_set "descr" "Verify the use of -a and -t together"
+}
+
+a_t_flags_body()
+{
+	mkdir -p testdir/nested
+	cd testdir
+	atf_check truncate -s 2M nested/A
+	atf_check truncate -s 1M nested/B
+
+	atf_check -o inline:'2.0M\tnested/A\n3.0M\tnested/\n' \
+	    du -aAht 1536K nested/
+}
+
 atf_init_test_cases()
 {
 	atf_add_test_case A_flag
@@ -186,4 +203,5 @@
 	atf_add_test_case k_flag
 	atf_add_test_case m_flag
 	atf_add_test_case si_flag
+	atf_add_test_case a_t_flags
 }