diff --git a/fsck.c b/fsck.c
index 99c04976748..918bf9a3186 100644
--- a/fsck.c
+++ b/fsck.c
@@ -175,7 +175,7 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func)
 			has_dot = 1;
 		if (!strcmp(name, ".."))
 			has_dotdot = 1;
-		if (!strcmp(name, ".git"))
+		if (!strcasecmp(name, ".git"))
 			has_dotgit = 1;
 		has_zero_pad |= *(char *)desc.buffer == '0';
 		update_tree_entry(&desc);
diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
index 4d8a4fe3c79..04387125530 100755
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh
@@ -263,6 +263,7 @@ done <<-\EOF
 dot .
 dotdot ..
 dotgit .git
+dotgit-case .GIT
 EOF
 
 test_done