diff --git a/Source/Modules/ControllerModules/StringUtils.swift b/Source/Modules/ControllerModules/StringUtils.swift
index 135f56f5..dc997a42 100644
--- a/Source/Modules/ControllerModules/StringUtils.swift
+++ b/Source/Modules/ControllerModules/StringUtils.swift
@@ -63,10 +63,6 @@ extension String {
     return string[..<string.index(string.startIndex, offsetBy: fixedIndex)].utf16.count
   }
 
-  public var expandingTildeInPath: String {
-    (self as NSString).expandingTildeInPath
-  }
-
   public func utf16SubString(with range: NSRange) -> String {
     (self as NSString).substring(with: range)
   }
diff --git a/Source/Modules/IMEModules/IME.swift b/Source/Modules/IMEModules/IME.swift
index 4ae72006..e6648177 100644
--- a/Source/Modules/IMEModules/IME.swift
+++ b/Source/Modules/IMEModules/IME.swift
@@ -355,9 +355,16 @@ extension RangeReplaceableCollection where Element: Hashable {
   }
 }
 
-// MARK: - Error Extension
+// MARK: - String Tildes Expansion Extension
+
+extension String {
+  public var expandingTildeInPath: String {
+    (self as NSString).expandingTildeInPath
+  }
+}
+
+// MARK: - String Localized Error Extension
 
-extension String: Error {}
 extension String: LocalizedError {
   public var errorDescription: String? {
     self