diff --git a/contrib/elftoolchain/libelf/_libelf_config.h b/contrib/elftoolchain/libelf/_libelf_config.h
index f28dc8ddf24e..0f7ed031c98f 100644
--- a/contrib/elftoolchain/libelf/_libelf_config.h
+++ b/contrib/elftoolchain/libelf/_libelf_config.h
@@ -91,6 +91,12 @@
 #endif
 #define	LIBELF_CLASS		ELFCLASS32
 
+#elif	defined(__powerpc64__)
+
+#define	LIBELF_ARCH		EM_PPC64
+#define	LIBELF_BYTEORDER	ELFDATA2MSB
+#define	LIBELF_CLASS		ELFCLASS64
+
 #elif	defined(__powerpc__)
 
 #define	LIBELF_ARCH		EM_PPC