diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index cc3b1496f..abc044542 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -2360,7 +2360,7 @@ rule FORTRAN_DEP_HACK
         e.add_item('COMMAND', [sys.executable,
                                self.environment.get_build_command(),
                                '--internal', 'cleantrees', d_file])
-        e.add_item('description', 'Cleaning CustomTarget directories.')
+        e.add_item('description', 'Cleaning custom targets directories.')
         e.write(outfile)
         # Write out the data file passed to the script
         with open(d_file, 'wb') as ofile: