diff --git a/meson.build b/meson.build
index fc2e348ea..41a275866 100644
--- a/meson.build
+++ b/meson.build
@@ -608,7 +608,6 @@ add_project_arguments(
   # for consistency with the installed header being lix/config.h
   '-include', 'lix/config.h',
   '-Wno-unused-parameter',
-  '-Wno-deprecated-declarations',
   '-Wno-missing-field-initializers',
   '-Wimplicit-fallthrough',
   '-Werror=switch',
diff --git a/subprojects/nix-eval-jobs/src/meson.build b/subprojects/nix-eval-jobs/src/meson.build
index 72f7ee8bd..365034c60 100644
--- a/subprojects/nix-eval-jobs/src/meson.build
+++ b/subprojects/nix-eval-jobs/src/meson.build
@@ -1,6 +1,5 @@
 add_project_arguments(
   '-Wno-unused-parameter',
-  '-Wno-deprecated-declarations',
   '-Wno-missing-field-initializers',
   '-Wimplicit-fallthrough',
   '-Werror=switch',