diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index f360dee64e..a40dbf86b4 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,7 @@
+2010-04-10  Mike Frysinger  <vapier@gentoo.org>
+
+	* sim-trace.c (save_data): Add const markings to "buf" argument.
+
 2010-04-10  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-options.c (standard_option_handler): Add const markings to
diff --git a/sim/common/sim-trace.c b/sim/common/sim-trace.c
index 478cbfa27d..358a01dce9 100644
--- a/sim/common/sim-trace.c
+++ b/sim/common/sim-trace.c
@@ -513,7 +513,7 @@ save_data (SIM_DESC sd,
 	   TRACE_DATA *data,
 	   data_fmt fmt,
 	   long size,
-	   void *buf)
+	   const void *buf)
 {
   int i = TRACE_INPUT_IDX (data);
   if (i == sizeof (TRACE_INPUT_FMT (data)))