diff --git a/gas/ChangeLog b/gas/ChangeLog
index 94c7301a68..57a14261bd 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,7 @@
 Wed Jul  5 12:01:49 1995  Ian Lance Taylor  <ian@cygnus.com>
 
+	* conf.in: Add undef of HAVE_SBRK.
+
 	* config/obj-coff.c (obj_coff_line): Call listing_source_line, in
 	both BFD_ASSEMBLER and non BFD_ASSEMBLER versions of the function.
 
diff --git a/gas/conf.in b/gas/conf.in
index fca9d46c66..3cbfce96af 100644
--- a/gas/conf.in
+++ b/gas/conf.in
@@ -86,6 +86,9 @@
 /* Define if you have the unlink function.  */
 #undef HAVE_UNLINK
 
+/* Define if you have the sbrk function.  */
+#undef HAVE_SBRK
+
 /* Define if you have the <errno.h> header file.  */
 #undef HAVE_ERRNO_H