diff --git a/Sources/Splash/Grammar/SwiftGrammar.swift b/Sources/Splash/Grammar/SwiftGrammar.swift
index 79a98d5..cc07d9c 100644
--- a/Sources/Splash/Grammar/SwiftGrammar.swift
+++ b/Sources/Splash/Grammar/SwiftGrammar.swift
@@ -13,7 +13,9 @@ public struct SwiftGrammar: Grammar {
     public var syntaxRules: [SyntaxRule]
 
     public init() {
-        var delimiters = CharacterSet.alphanumerics.inverted
+        var delimiters = CharacterSet.alphanumerics
+        // Using the .inverted property crashes on Linux
+        delimiters.invert()
         delimiters.remove("_")
         delimiters.remove("\"")
         delimiters.remove("#")