diff --git a/Ghidra/Features/SwiftDemangler/src/main/java/ghidra/app/util/demangler/swift/SwiftNativeDemangler.java b/Ghidra/Features/SwiftDemangler/src/main/java/ghidra/app/util/demangler/swift/SwiftNativeDemangler.java
index 1fe4e40e36..0fa5a5758c 100644
--- a/Ghidra/Features/SwiftDemangler/src/main/java/ghidra/app/util/demangler/swift/SwiftNativeDemangler.java
+++ b/Ghidra/Features/SwiftDemangler/src/main/java/ghidra/app/util/demangler/swift/SwiftNativeDemangler.java
@@ -144,6 +144,7 @@ public class SwiftNativeDemangler {
 			command.add("demangle");
 		}
 		command.addAll(options);
+		command.add("--"); // indicate end of flags
 		command.add(mangled);
 		Process p = new ProcessBuilder(command).redirectErrorStream(true).start();
 		return new BufferedReader(new InputStreamReader(p.getInputStream()));