Index: src/asprintf.m
==================================================================
--- src/asprintf.m
+++ src/asprintf.m
@@ -24,11 +24,11 @@
 vasprintf(char **string, const char *format, va_list arguments)
 {
 	int length;
 	va_list argumentsCopy;
 
-	va_copy(argumentsCopy, argumentsCopy);
+	va_copy(argumentsCopy, arguments);
 
 	if ((length = vsnprintf(NULL, 0, format, argumentsCopy)) < 0)
 		return length;
 	if ((*string = malloc((size_t)length + 1)) == NULL)
 		return -1;