1 files changed, 12 insertions, 1 deletions
diff --git a/common/str.h b/common/str.h
index 7b97dfe945..8e07b6233d 100644
--- a/common/str.h
+++ b/common/str.h
@@ -24,6 +24,8 @@
 
 #include "common/scummsys.h"
 
+#include <stdarg.h>
+
 namespace Common {
 
 /**
@@ -213,10 +215,19 @@ public:
 	uint hash() const;
 
 	/**
-	 * Printf-like function. Returns a formatted String.
+	 * Print formatted data into a String object. Similar to sprintf,
+	 * except that it stores the result in (variably sized) String
+	 * instead of a fixed size buffer.
 	 */
 	static Common::String format(const char *fmt, ...) GCC_PRINTF(1,2);
 
+	/**
+	 * Print formatted data into a String object. Similar to vsprintf,
+	 * except that it stores the result in (variably sized) String
+	 * instead of a fixed size buffer.
+	 */
+	static Common::String vformat(const char *fmt, va_list args);
+
 public:
 	typedef char *        iterator;
 	typedef const char *  const_iterator;