diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e794f8a5..173ca8694 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Changed
 
 - **Breaking** Renamed module from `xcodeproj` to `XcodeProj` https://github.com/tuist/xcodeproj/pull/398 by @pepibumur.
+- Add `override` flag to `PBXGroup.addFile(at:,sourceTree:,sourceRoot:)` https://github.com/tuist/xcodeproj/pull/410 by @mrylmz
 
 ### Added
 
diff --git a/Sources/xcodeproj/Objects/Files/PBXGroup.swift b/Sources/xcodeproj/Objects/Files/PBXGroup.swift
index 80108b827..5451a99bd 100644
--- a/Sources/xcodeproj/Objects/Files/PBXGroup.swift
+++ b/Sources/xcodeproj/Objects/Files/PBXGroup.swift
@@ -144,14 +144,16 @@ public extension PBXGroup {
     ///
     /// - Parameters:
     ///   - filePath: path to the file.
-    ///   - sourceTree: file sourceTree, default is `.group`
+    ///   - sourceTree: file sourceTree, default is `.group`.
     ///   - sourceRoot: path to project's source root.
+    ///   - override: flag to enable overriding of existing file references, default is `true`.
     /// - Returns: new or existing file and its reference.
     @discardableResult
     func addFile(
         at filePath: Path,
         sourceTree: PBXSourceTree = .group,
-        sourceRoot: Path
+        sourceRoot: Path,
+        override: Bool = true
     ) throws -> PBXFileReference {
         let projectObjects = try objects()
         guard filePath.exists else {
@@ -159,9 +161,11 @@ public extension PBXGroup {
         }
         let groupPath = try fullPath(sourceRoot: sourceRoot)
 
-        if let existingFileReference = try projectObjects.fileReferences.first(where: {
+        let isFileReferencePathEqual: (Dictionary<PBXObjectReference, PBXFileReference>.Element) throws -> Bool = {
             try filePath == $0.value.fullPath(sourceRoot: sourceRoot)
-        }) {
+        }
+
+        if let existingFileReference = try projectObjects.fileReferences.first(where: isFileReferencePathEqual), override {
             if !childrenReferences.contains(existingFileReference.key) {
                 existingFileReference.value.path = groupPath.flatMap { filePath.relative(to: $0) }?.string
                 childrenReferences.append(existingFileReference.key)