diff --git a/gas/ChangeLog b/gas/ChangeLog
index 41e44b5438..009967d3cf 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,7 @@
+2015-11-19  Alan Modra  <amodra@gmail.com>
+
+	* config/tc-ppc.h (SUB_SEGMENT_ALIGN): Define only for ELF.
+
 2015-11-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* config/tc-microblaze.c (parse_imm): Add an offsetT cast.
diff --git a/gas/config/tc-ppc.h b/gas/config/tc-ppc.h
index d7766e3e9c..778acf5679 100644
--- a/gas/config/tc-ppc.h
+++ b/gas/config/tc-ppc.h
@@ -85,7 +85,9 @@ extern char *ppc_target_format (void);
 extern void ppc_handle_align (struct frag *);
 extern void ppc_frag_check (struct frag *);
 
+#ifdef OBJ_ELF
 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
+#endif
 
 #define md_frag_check(FRAGP) ppc_frag_check (FRAGP)