diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 96a0f5c5580..688df0d8c74 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 gcc/ChangeLog:
 
+2017-06-26  Jerome Lambourg  <lambourg@adacore.com>
+
+	* config/vxworks.h (VXWORKS_OS_CPP_BUILTINS): builtin_define
+	_VX_TOOL_FAMILY and _VX_TOOL to gnu.
+
 2017-06-26  Carl Love  <cel@us.ibm.com>
 
 	* config/rs6000/rs6000-c.c: Add support for built-in functions
diff --git a/gcc/config/vxworks.h b/gcc/config/vxworks.h
index 8a18aff4d78..d16c84d4259 100644
--- a/gcc/config/vxworks.h
+++ b/gcc/config/vxworks.h
@@ -131,6 +131,8 @@ extern void vxworks_asm_out_destructor (rtx symbol, int priority);
 	builtin_define ("__RTP__");					\
       else								\
 	builtin_define ("_WRS_KERNEL");					\
+      builtin_define ("_VX_TOOL_FAMILY=gnu");				\
+      builtin_define ("_VX_TOOL=gnu");					\
     }									\
   while (0)