diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index ee4797d349..8563a0f97d 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2005-05-08  Dave Korn   <dave.korn@artimi.com>
+
+	* coff-tic80.c:  Undefine _CONST after system headers to prevent
+	clash with tic80-specific definition in include/coff/tic80.h
+
 2005-05-08  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR 939
diff --git a/bfd/coff-tic80.c b/bfd/coff-tic80.c
index 3c08964824..ec9cbeef59 100644
--- a/bfd/coff-tic80.c
+++ b/bfd/coff-tic80.c
@@ -28,6 +28,14 @@ Boston, MA 02110-1301, USA.  */
 #include "bfdlink.h"
 #include "sysdep.h"
 #include "libbfd.h"
+#ifdef _CONST
+/* Newlib-based hosts define _CONST as a STDC-safe alias for const,
+  but to the tic80 toolchain it means something altogether different.
+  Since sysdep.h will have pulled in stdio.h and hence _ansi.h which
+  contains this definition, we must undef it before including the 
+  tic80-specific definition. */
+#undef _CONST
+#endif /* _CONST */
 #include "coff/tic80.h"
 #include "coff/internal.h"
 #include "libcoff.h"