diff --git a/gmodule/gmodule.c b/gmodule/gmodule.c
index f0ba81b2e..8bdcd9da0 100644
--- a/gmodule/gmodule.c
+++ b/gmodule/gmodule.c
@@ -481,7 +481,7 @@ g_module_open_full (const gchar   *file_name,
     _g_module_debug_init ();
 
   if (module_debug_flags & G_MODULE_DEBUG_BIND_NOW_MODULES)
-    flags &= ~G_MODULE_BIND_LAZY;
+    flags &= (unsigned) ~G_MODULE_BIND_LAZY;
 
   if (!file_name)
     {      
diff --git a/gmodule/meson.build b/gmodule/meson.build
index f91924635..37a8fa42d 100644
--- a/gmodule/meson.build
+++ b/gmodule/meson.build
@@ -96,7 +96,7 @@ libgmodule = library('gmodule-2.0',
   install : true,
   include_directories : [configinc, gmoduleinc],
   dependencies : [libdl_dep, libglib_dep],
-  c_args : ['-DG_LOG_DOMAIN="GModule"', '-DGMODULE_COMPILATION'],
+  c_args : ['-DG_LOG_DOMAIN="GModule"', '-DGMODULE_COMPILATION', warning_sign_conversion_args],
   gnu_symbol_visibility : 'hidden',
   link_args : [glib_link_flags],
 )
diff --git a/gmodule/tests/meson.build b/gmodule/tests/meson.build
index 5374c1c2a..e7d7b3dd1 100644
--- a/gmodule/tests/meson.build
+++ b/gmodule/tests/meson.build
@@ -75,7 +75,7 @@ test_env.set('G_TEST_SRCDIR', meson.current_source_dir())
 test_env.set('G_TEST_BUILDDIR', meson.current_build_dir())
 
 test_deps = [libm, thread_dep, libglib_dep, libgmodule_dep]
-test_cargs = ['-DG_LOG_DOMAIN="GModule"', '-UG_DISABLE_ASSERT']
+test_cargs = ['-DG_LOG_DOMAIN="GModule"', '-UG_DISABLE_ASSERT', warning_sign_conversion_args]
 test_cpp_args = test_cargs
 
 foreach test_name, extra_args : gmodule_tests