diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f6328f4d856..d300118cb02 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-07-31  Richard Earnshaw  <rearnsha@arm.com>
+
+	* config/pdp11/pdp11.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): Redefine
+	to speculation_safe_value_not_needed.
+
 2018-07-31  Richard Earnshaw  <rearnsha@arm.com>
 
 	* targhooks.h (speculation_safe_value_not_needed): New prototype.
diff --git a/gcc/config/pdp11/pdp11.c b/gcc/config/pdp11/pdp11.c
index 1bcdaed79dc..62c653fd8a1 100644
--- a/gcc/config/pdp11/pdp11.c
+++ b/gcc/config/pdp11/pdp11.c
@@ -291,6 +291,9 @@ static bool pdp11_scalar_mode_supported_p (scalar_mode);
 
 #undef TARGET_INVALID_WITHIN_DOLOOP
 #define TARGET_INVALID_WITHIN_DOLOOP hook_constcharptr_const_rtx_insn_null
+
+#undef TARGET_HAVE_SPECULATION_SAFE_VALUE
+#define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
 
 /* A helper function to determine if REGNO should be saved in the
    current function's stack frame.  */