diff --git a/build-baremetal b/build-baremetal
index b2aa9ec..969c731 100755
--- a/build-baremetal
+++ b/build-baremetal
@@ -65,7 +65,7 @@ Build the baremetal examples with crosstool-NG.
             (self.env['common_c'], common_obj),
             (syscalls_src, syscalls_obj),
         ]:
-            if self.need_rebuild([src], obj):
+            if self.need_rebuild([src, self.env['common_h']], obj):
                 self.sh.run_cmd(
                     [gcc,  LF] +
                     cflags +
@@ -150,7 +150,7 @@ Build the baremetal examples with crosstool-NG.
                 in_name = os.path.splitext(in_basename)[0]
                 main_obj = os.path.join(self.env['baremetal_build_dir'], subpath, '{}{}'.format(in_name, self.env['obj_ext']))
                 src = os.path.join(self.env['baremetal_source_dir'], in_path)
-                if self.need_rebuild([src], main_obj):
+                if self.need_rebuild([src, self.env['common_h']], main_obj):
                     self.sh.run_cmd(
                         [gcc,  LF] +
                         cflags +