diff --git a/Sources/FormattingHelpers.swift b/Sources/FormattingHelpers.swift
index 66ba33fa..0c67bd80 100644
--- a/Sources/FormattingHelpers.swift
+++ b/Sources/FormattingHelpers.swift
@@ -2870,7 +2870,7 @@ extension Formatter {
                         ["static", "class"].contains(string)
                     })
                     if let name = name, classOrStatic || !staticSelf {
-                        processAccessors(["get", "set", "willSet", "didSet", "init"], for: name,
+                        processAccessors(["get", "set", "willSet", "didSet", "init", "_modify"], for: name,
                                          at: &index, localNames: localNames, members: members,
                                          typeStack: &typeStack, closureStack: &closureStack,
                                          membersByType: &membersByType,
@@ -3186,7 +3186,7 @@ extension Formatter {
                         token = tokens[nextIndex]
                     }
                     switch token.string {
-                    case "get":
+                    case "get", "_modify":
                         localNames.insert(name)
                     case "set", "init":
                         localNames.insert(name)
diff --git a/Sources/Inference.swift b/Sources/Inference.swift
index ac74ddff..ba2e91c6 100644
--- a/Sources/Inference.swift
+++ b/Sources/Inference.swift
@@ -994,7 +994,7 @@ private struct Inference {
                         prevIndex -= 1
                     }
                     if let name = name {
-                        processAccessors(["get", "set", "willSet", "didSet", "init"], for: name,
+                        processAccessors(["get", "set", "willSet", "didSet", "init", "_modify"], for: name,
                                          at: &index, localNames: localNames, members: members,
                                          typeStack: &typeStack, membersByType: &membersByType,
                                          classMembersByType: &classMembersByType,
diff --git a/Sources/ParsingHelpers.swift b/Sources/ParsingHelpers.swift
index 99bfb924..cfb8858f 100644
--- a/Sources/ParsingHelpers.swift
+++ b/Sources/ParsingHelpers.swift
@@ -668,7 +668,7 @@ extension Formatter {
 
     func isAccessorKeyword(at i: Int, checkKeyword: Bool = true) -> Bool {
         guard !checkKeyword ||
-            ["get", "set", "willSet", "didSet", "init"].contains(token(at: i)?.string ?? ""),
+            ["get", "set", "willSet", "didSet", "init", "_modify"].contains(token(at: i)?.string ?? ""),
             var prevIndex = index(of: .nonSpaceOrCommentOrLinebreak, before: i)
         else {
             return false
@@ -1120,7 +1120,7 @@ extension Formatter {
                     return true
                 }
                 return false
-            case "get", "set", "willSet", "didSet", "init":
+            case "get", "set", "willSet", "didSet", "init", "_modify":
                 return isAccessorKeyword(at: i, checkKeyword: false)
             case "actor":
                 if last(.nonSpaceOrCommentOrLinebreak, before: i)?.isOperator(ofType: .infix) == true {