diff --git a/obs-service-source_validator.changes b/obs-service-source_validator.changes
index 09e1512..2bdd0db 100644
--- a/obs-service-source_validator.changes
+++ b/obs-service-source_validator.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Aug 12 12:07:26 UTC 2024 - Marcus Rueckert <mrueckert@suse.de>
+
+- Fix runtime requires: the source validator needs cmp -> Requires
+  for diffutils
+
 -------------------------------------------------------------------
 Wed Jul  3 06:17:00 UTC 2024 - Dirk Müller <dmueller@suse.com>
 
diff --git a/obs-service-source_validator.spec b/obs-service-source_validator.spec
index 54ac52d..0c19239 100644
--- a/obs-service-source_validator.spec
+++ b/obs-service-source_validator.spec
@@ -36,6 +36,7 @@ BuildRequires:  zstd
 Requires:       %{_bindir}/cpio
 Requires:       %{_bindir}/xmllint
 Requires:       %{build_pkg_name}
+Requires:       diffutils
 Requires:       patch
 Requires:       perl-TimeDate
 Requires:       unzip