diff --git a/Sources/XcodeProj/Project/Xcode.swift b/Sources/XcodeProj/Project/Xcode.swift
index 44ab18058..fdd78cfcc 100644
--- a/Sources/XcodeProj/Project/Xcode.swift
+++ b/Sources/XcodeProj/Project/Xcode.swift
@@ -175,6 +175,7 @@ public enum Xcode {
         "i": "sourcecode.c.c.preprocessed",
         "icns": "image.icns",
         "ico": "image.ico",
+        "icon": "folder.iconcomposer.icon",
         "iconset": "folder.iconset",
         "ii": "sourcecode.cpp.cpp.preprocessed",
         "iig": "sourcecode.iig",
diff --git a/Tests/XcodeProjTests/Project/XcodeTests.swift b/Tests/XcodeProjTests/Project/XcodeTests.swift
new file mode 100644
index 000000000..15bfad0f5
--- /dev/null
+++ b/Tests/XcodeProjTests/Project/XcodeTests.swift
@@ -0,0 +1,9 @@
+import XCTest
+
+@testable import XcodeProj
+
+final class XcodeTests: XCTestCase {
+    func test_filetype_whenIconComposerBundle() {
+        XCTAssertEqual(Xcode.filetype(extension: "icon"), "folder.iconcomposer.icon")
+    }
+}