diff --git a/deep_profiler/Mercury.options b/deep_profiler/Mercury.options
index 24e73a80d..09b52a141 100644
--- a/deep_profiler/Mercury.options
+++ b/deep_profiler/Mercury.options
@@ -30,3 +30,5 @@ MCFLAGS-canonical               += --no-warn-dead-preds
 # Uncomment this to see debug messages from the code that reads the Deep.data
 # files.
 # MCFLAGS-read_profile += --trace-flag debug_read_profdeep
+
+MCFLAGS-mdbcomp                 += --no-warn-include-and-non-include
diff --git a/grade_lib/Mercury.options b/grade_lib/Mercury.options
index e69de29bb..224945649 100644
--- a/grade_lib/Mercury.options
+++ b/grade_lib/Mercury.options
@@ -0,0 +1,2 @@
+
+MCFLAGS-grade_lib               += --no-warn-include-and-non-include
diff --git a/slice/Mercury.options b/slice/Mercury.options
index 92e311873..4e42c8769 100644
--- a/slice/Mercury.options
+++ b/slice/Mercury.options
@@ -1,7 +1,7 @@
 #-----------------------------------------------------------------------------#
 # vim: ts=4 sw=4 expandtab
 #-----------------------------------------------------------------------------#
-# Copyright (C) 2023 The Mercury team.
+# Copyright (C) 2023, 2025 The Mercury team.
 # This file may only be copied under the terms of the GNU General
 # Public License - see the file COPYING in the Mercury distribution.
 #-----------------------------------------------------------------------------#
@@ -9,3 +9,4 @@
 #-----------------------------------------------------------------------------#
 
 MCFLAGS-mtc_diff            +=--no-warn-det-decls-too-lax
+MCFLAGS-mdbcomp             +=--no-warn-include-and-non-include