diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index 4868752..b3f32e8 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -267,7 +267,7 @@
 static void ParseCStringVector(std::vector<char *> &output,
                                const char *input) {
   // Characters which will be treated as token separators:
-  static const char *delims = " \v\f\t\r\n";
+  static const char *const delims = " \v\f\t\r\n";
 
   std::string work (input);
   // Skip past any delims at head of input string.