diff --git a/builtin/log.c b/builtin/log.c
index 04a6ef97bc..0f98ac8a34 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -113,6 +113,13 @@ struct log_config {
 	int fmt_patch_name_max;
 	char *fmt_pretty;
 	char *default_date_mode;
+
+	/*
+	 * Note: git_log_config() does not touch this member and that
+	 * is very deliberate.  This member is only to be used to
+	 * resurrect whatchanged that is deprecated.
+	 */
+	int i_still_use_this;
 };
 
 static void log_config_init(struct log_config *cfg)
@@ -267,6 +274,8 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 		OPT__QUIET(&quiet, N_("suppress diff output")),
 		OPT_BOOL(0, "source", &source, N_("show source")),
 		OPT_BOOL(0, "use-mailmap", &mailmap, N_("use mail map file")),
+		OPT_HIDDEN_BOOL(0, "i-still-use-this", &cfg->i_still_use_this,
+				"<use this deprecated command>"),
 		OPT_ALIAS(0, "mailmap", "use-mailmap"),
 		OPT_CALLBACK_F(0, "clear-decorations", NULL, NULL,
 			       N_("clear all previously-defined decoration filters"),
@@ -656,6 +665,10 @@ int cmd_whatchanged(int argc,
 	opt.def = "HEAD";
 	opt.revarg_opt = REVARG_COMMITTISH;
 	cmd_log_init(argc, argv, prefix, &rev, &opt, &cfg);
+
+	if (!cfg.i_still_use_this)
+		you_still_use_that("git whatchanged");
+
 	if (!rev.diffopt.output_format)
 		rev.diffopt.output_format = DIFF_FORMAT_RAW;
 
diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index 3855d68dbc..8caab2ee38 100755
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -203,11 +203,19 @@ do
 	test_expect_success "git $cmd # magic is ${magic:-(not used)}" '
 		{
 			echo "$ git $cmd"
+
+			case "$cmd" in
+			whatchanged | whatchanged" "*)
+				run="whatchanged --i-still-use-this"
+				run="$run ${cmd#whatchanged}" ;;
+			*)
+				run=$cmd ;;
+			esac &&
 			case "$magic" in
 			"")
-				GIT_PRINT_SHA1_ELLIPSIS=yes git $cmd ;;
+				GIT_PRINT_SHA1_ELLIPSIS=yes git $run ;;
 			noellipses)
-				git $cmd ;;
+				git $run ;;
 			esac |
 			sed -e "s/^\\(-*\\)$V\\(-*\\)\$/\\1g-i-t--v-e-r-s-i-o-n\2/" \
 			    -e "s/^\\(.*mixed; boundary=\"-*\\)$V\\(-*\\)\"\$/\\1g-i-t--v-e-r-s-i-o-n\2\"/"
@@ -454,6 +462,11 @@ diff-tree --stat --compact-summary initial mode
 diff-tree -R --stat --compact-summary initial mode
 EOF
 
+test_expect_success 'whatchanged needs --i-still-use-this' '
+	test_must_fail git whatchanged >message 2>&1 &&
+	test_grep "nominated for removal" message
+'
+
 test_expect_success 'log -m matches pure log' '
 	git log master >result &&
 	process_diffs result >expected &&
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 51f7beb59f..ce4c7ab2af 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -490,6 +490,7 @@ for cmd in show whatchanged reflog format-patch
 do
 	case "$cmd" in
 	format-patch) myarg="HEAD~.." ;;
+	whatchanged) myarg=--i-still-use-this ;;
 	*) myarg= ;;
 	esac
 
@@ -1202,19 +1203,22 @@ test_expect_success 'reflog is expected format' '
 '
 
 test_expect_success 'whatchanged is expected format' '
+	whatchanged="whatchanged --i-still-use-this" &&
 	git log --no-merges --raw >expect &&
-	git whatchanged >actual &&
+	git $whatchanged >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'log.abbrevCommit configuration' '
+	whatchanged="whatchanged --i-still-use-this" &&
+
 	git log --abbrev-commit >expect.log.abbrev &&
 	git log --no-abbrev-commit >expect.log.full &&
 	git log --pretty=raw >expect.log.raw &&
 	git reflog --abbrev-commit >expect.reflog.abbrev &&
 	git reflog --no-abbrev-commit >expect.reflog.full &&
-	git whatchanged --abbrev-commit >expect.whatchanged.abbrev &&
-	git whatchanged --no-abbrev-commit >expect.whatchanged.full &&
+	git $whatchanged --abbrev-commit >expect.whatchanged.abbrev &&
+	git $whatchanged --no-abbrev-commit >expect.whatchanged.full &&
 
 	test_config log.abbrevCommit true &&
 
@@ -1231,9 +1235,9 @@ test_expect_success 'log.abbrevCommit configuration' '
 	git reflog --no-abbrev-commit >actual &&
 	test_cmp expect.reflog.full actual &&
 
-	git whatchanged >actual &&
+	git $whatchanged >actual &&
 	test_cmp expect.whatchanged.abbrev actual &&
-	git whatchanged --no-abbrev-commit >actual &&
+	git $whatchanged --no-abbrev-commit >actual &&
 	test_cmp expect.whatchanged.full actual
 '