diff --git a/indra/llui/lluistring.h b/indra/llui/lluistring.h
index eff2467bf0a2bf6e5c86c94313eae387735ce1fb..4faa0e070e673e62dd183346f5814a9a05e08419 100644
--- a/indra/llui/lluistring.h
+++ b/indra/llui/lluistring.h
@@ -58,10 +58,12 @@ class LLUIString
 public:
 	// These methods all perform appropriate argument substitution
 	// and modify mOrig where appropriate
-        LLUIString() : mArgs(NULL), mNeedsResult(false), mNeedsWResult(false) {}
+	LLUIString() : mArgs(NULL), mNeedsResult(false), mNeedsWResult(false) {}
 	LLUIString(const std::string& instring, const LLStringUtil::format_map_t& args);
 	LLUIString(const std::string& instring) : mArgs(NULL) { assign(instring); }
 
+	~LLUIString() { delete mArgs; }
+
 	void assign(const std::string& instring);
 	LLUIString& operator=(const std::string& s) { assign(s); return *this; }
 
@@ -81,14 +83,14 @@ class LLUIString
 
 	void clear();
 	void clearArgs() { if (mArgs) mArgs->clear(); }
-	
+
 	// These utility functions are included for text editing.
 	// They do not affect mOrig and do not perform argument substitution
 	void truncate(S32 maxchars);
 	void erase(S32 charidx, S32 len);
 	void insert(S32 charidx, const LLWString& wchars);
 	void replace(S32 charidx, llwchar wc);
-	
+
 private:
 	// something changed, requiring reformatting of strings
 	void dirty();
@@ -100,7 +102,7 @@ class LLUIString
 	void updateResult() const;
 	void updateWResult() const;
 	LLStringUtil::format_map_t& getArgs();
-	
+
 	std::string mOrig;
 	mutable std::string mResult;
 	mutable LLWString mWResult; // for displaying