diff --git a/Documentation/config.txt b/Documentation/config.txt
index 8d3f5180831cf2..12a89f693597ea 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -410,6 +410,8 @@ include::config/i18n.txt[]
 
 include::config/imap.txt[]
 
+include::config/includeif.txt[]
+
 include::config/index.txt[]
 
 include::config/init.txt[]
diff --git a/Documentation/config/includeif.txt b/Documentation/config/includeif.txt
new file mode 100644
index 00000000000000..82fe431c34b08c
--- /dev/null
+++ b/Documentation/config/includeif.txt
@@ -0,0 +1,6 @@
+include.path::
+includeIf.<condition>.path::
+	Special variables to include other configuration files. See
+	the "CONFIGURATION FILE" section in the main
+	linkgit:git-config[1] documentation,
+	specifically the "Includes" and "Conditional Includes" subsections.
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 98c628063288bc..80cc11e7ecdbad 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -2330,6 +2330,13 @@ test_expect_success 'git config - section' '
 	EOF
 '
 
+test_expect_success 'git config - section include, includeIf' '
+	test_completion "git config inclu" <<-\EOF
+	include.Z
+	includeIf.Z
+	EOF
+'
+
 test_expect_success 'git config - variable name' '
 	test_completion "git config log.d" <<-\EOF
 	log.date Z
@@ -2338,6 +2345,12 @@ test_expect_success 'git config - variable name' '
 	EOF
 '
 
+test_expect_success 'git config - variable name include' '
+	test_completion "git config include.p" <<-\EOF
+	include.path Z
+	EOF
+'
+
 test_expect_success 'git config - value' '
 	test_completion "git config color.pager " <<-\EOF
 	false Z