diff --git a/Documentation/config.txt b/Documentation/config.txt
index 1df0f65..5506e31 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -539,9 +539,13 @@
 	linkgit:git-read-tree[1] for more information.
 
 add.ignore-errors::
+add.ignoreErrors::
 	Tells 'git add' to continue adding files when some files cannot be
 	added due to indexing errors. Equivalent to the '--ignore-errors'
-	option of linkgit:git-add[1].
+	option of linkgit:git-add[1].  Older versions of git accept only
+	`add.ignore-errors`, which does not follow the usual naming
+	convention for configuration variables.  Newer versions of git
+	honor `add.ignoreErrors` as well.
 
 alias.*::
 	Command aliases for the linkgit:git[1] command wrapper - e.g.
diff --git a/builtin/add.c b/builtin/add.c
index 56a4e0a..3a5fca5 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -331,7 +331,8 @@
 
 static int add_config(const char *var, const char *value, void *cb)
 {
-	if (!strcasecmp(var, "add.ignore-errors")) {
+	if (!strcasecmp(var, "add.ignoreerrors") ||
+	    !strcasecmp(var, "add.ignore-errors")) {
 		ignore_add_errors = git_config_bool(var, value);
 		return 0;
 	}