diff --git a/ChangeLog b/ChangeLog
index 4ad8e5cc7..a6c02b9b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2018-12-12  Werner Lemberg  <wl@gnu.org>
+
+	[gxvalid] Fix compiler warnings.
+
+	* src/gxvalid/gxvjust.c (gxv_just_check_max_gid),
+	src/gxvalid/gxvmort.c (gxv_mort_coverage_validate): Use `FT_UNUSED'.
+
 2018-12-11  Werner Lemberg  <wl@gnu.org>
 
 	* src/truetype/ttgload.c (TT_Hint_Glyph): Remove useless test.
diff --git a/src/gxvalid/gxvjust.c b/src/gxvalid/gxvjust.c
index 02d36e720..26b302521 100644
--- a/src/gxvalid/gxvjust.c
+++ b/src/gxvalid/gxvjust.c
@@ -72,6 +72,8 @@
                           const FT_String*  msg_tag,
                           GXV_Validator     gxvalid )
   {
+    FT_UNUSED( msg_tag );
+
     if ( gid < gxvalid->face->num_glyphs )
       return;
 
diff --git a/src/gxvalid/gxvmort.c b/src/gxvalid/gxvmort.c
index 2e94894f0..5c845420c 100644
--- a/src/gxvalid/gxvmort.c
+++ b/src/gxvalid/gxvmort.c
@@ -123,6 +123,7 @@
                               GXV_Validator  gxvalid )
   {
     FT_UNUSED( gxvalid );
+    FT_UNUSED( coverage );
 
 #ifdef FT_DEBUG_LEVEL_TRACE
     if ( coverage & 0x8000U )