diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 542d3a0fbec70aaab7243f54961d8cdef40f421b..d1118fa8356fb5d64ffb538ccb02d642f86d17b2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2016-11-16  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/pdp11/pdp11.c: Include dbxout.h.
+
 2016-11-16  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* config/arc/arc.c (arc_loop_hazard): Add missing brackets.
diff --git a/gcc/config/pdp11/pdp11.c b/gcc/config/pdp11/pdp11.c
index 1dc3eefab30127a7f11e7b1091c39d94e4c7210f..8e2de1452ba1418e4420fddf409760bad858c62e 100644
--- a/gcc/config/pdp11/pdp11.c
+++ b/gcc/config/pdp11/pdp11.c
@@ -39,6 +39,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "calls.h"
 #include "expr.h"
 #include "builtins.h"
+#include "dbxout.h"
 
 /* This file should be included last.  */
 #include "target-def.h"