diff --git a/debian/changelog b/debian/changelog
index acc3ccdf6..8a9295198 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -20,6 +20,7 @@ apt (0.5.23) unstable; urgency=low
     Specifically, always use -p$@ rather than an explicit package name,
     and always specify it first, and use dh_shlibdeps -l uniformly rather
     than sometimes changing LD_LIBRARY_PATH directly
+  * Document unit for Cache-Limit (bytes) (Closes: #234737)
 
  --
 
diff --git a/doc/apt.conf.5.xml b/doc/apt.conf.5.xml
index 33269a2f6..405427ac1 100644
--- a/doc/apt.conf.5.xml
+++ b/doc/apt.conf.5.xml
@@ -121,7 +121,7 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";};
 
      <varlistentry><term>Cache-Limit</term>
      <listitem><para>APT uses a fixed size memory mapped cache file to store the 'available'
-     information. This sets the size of that cache.</para></listitem>
+     information. This sets the size of that cache (in bytes).</para></listitem>
      </varlistentry>
 
      <varlistentry><term>Build-Essential</term>