diff --git a/dnf.spec b/dnf.spec
index 5cc8d0344e..f8d3f055f6 100644
--- a/dnf.spec
+++ b/dnf.spec
@@ -134,7 +134,9 @@ BuildRequires:  libmodulemd >= %{libmodulemd_version}
 Requires:       libmodulemd >= %{libmodulemd_version}
 Requires:       %{name}-data = %{version}-%{release}
 %if 0%{?fedora}
+%if 0%{?fedora} < 40
 Recommends:     deltarpm
+%endif
 # required for DNSSEC main.gpgkey_dns_verification https://dnf.readthedocs.io/en/latest/conf_ref.html
 Recommends:     python3-unbound
 %endif
diff --git a/doc/conf_ref.rst b/doc/conf_ref.rst
index 6f060977d6..5827c7e4d9 100644
--- a/doc/conf_ref.rst
+++ b/doc/conf_ref.rst
@@ -872,7 +872,7 @@ configuration.
 
     When enabled, DNF will save bandwidth by downloading much smaller delta RPM
     files, rebuilding them to RPM locally. However, this is quite CPU and I/O
-    intensive. Default is True.
+    intensive. Default is False. It requires `/usr/bin/applydeltarpm` on the system.
 
 .. _deltarpm_percentage-label: