diff -ru gsl-1.16-orig/test/results.c gsl-1.16/test/results.c
--- gsl-1.16-orig/test/results.c	2013-07-17 13:04:26.000000000 -0700
+++ gsl-1.16/test/results.c	2015-04-28 13:24:11.901318472 -0700
@@ -29,7 +29,7 @@
 #ifdef STDC_HEADERS
 #include <stdarg.h>
 #else
-#include <varargs.h>
+#include <stdarg.h>
 #endif
 #endif