--- a/advance/d2/d2.cc
+++ b/advance/d2/d2.cc
@@ -21,6 +21,9 @@
 #include <string>
 #include <iostream>
 #include <sstream>
+#if defined(__PPC64__)
+#define __STRICT_ANSI__
+#endif
 #include <cstdlib>
 #include <cstdio>
 
--- a/advance/lib/portable.h
+++ b/advance/lib/portable.h
@@ -67,6 +67,9 @@
 
 /* Include some standard headers */
 #include <stdio.h>
+#if defined(__PPC64__)
+#define __STRICT_ANSI__
+#endif
 #include <stdlib.h> /* On many systems (e.g., Darwin), `stdio.h' is a prerequisite. */
 #include <stdarg.h>
 #include <string.h>