diff --git a/CHANGES b/CHANGES
index c32b0f6160b..51147663be4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,9 +4,11 @@ Release 6.1.2 (in development)
 Bugs fixed
 ----------
 
-* #11099: LaTeX: shadowrule key of sphinxsetup causes PDF build to crash
+* #11101: LaTeX: ``div.topic_padding`` key of sphinxsetup documented at 5.1.0 was
+  implemented with name ``topic_padding``
+* #11099: LaTeX: ``shadowrule`` key of sphinxsetup causes PDF build to crash
   since Sphinx 5.1.0
-* #11096: LaTeX: shadowsize key of sphinxsetup causes PDF build to crash
+* #11096: LaTeX: ``shadowsize`` key of sphinxsetup causes PDF build to crash
   since Sphinx 5.1.0
 * #11095: LaTeX: shadow of :dudir:`topic` and contents_ boxes not in page
   margin since Sphinx 5.1.0
diff --git a/doc/latex.rst b/doc/latex.rst
index 1d7922ba489..53c3350f027 100644
--- a/doc/latex.rst
+++ b/doc/latex.rst
@@ -1165,6 +1165,10 @@ Options for topic boxes:
   | ``div.topic_padding-left``,
   | ``div.topic_padding``,
     again this is a single dimension.  Its default is ``5pt``.
+
+  .. versionchanged:: 6.1.2
+     These keys had been implemented at 5.1.0 without ``div.`` in
+     their names.
 - | ``div.topic_border-top-left-radius``,
   | ``div.topic_border-top-right-radius``,
   | ``div.topic_border-bottom-right-radius``,
diff --git a/sphinx/texinputs/sphinx.sty b/sphinx/texinputs/sphinx.sty
index cd3c30c505f..618ee0b90b7 100644
--- a/sphinx/texinputs/sphinx.sty
+++ b/sphinx/texinputs/sphinx.sty
@@ -445,11 +445,13 @@ will be set to white}%
             \else\spx@topic@border@opentrue\fi}%
 %
 % MEMO: \sphinxshadowsep not used anywhere anymore in code base and to be removed
-\define@key{sphinx}{topic_padding-top}{\def\spx@topic@padding@top{#1}}
-\define@key{sphinx}{topic_padding-right}{\def\spx@topic@padding@right{#1}}
-\define@key{sphinx}{topic_padding-bottom}{\def\spx@topic@padding@bottom{#1}}
-\define@key{sphinx}{topic_padding-left}{\def\spx@topic@padding@left{#1}}
-\define@key{sphinx}{topic_padding}{%
+% Sadly the 5.1.0 definitions forgot the "div." part of the key names
+% Fixed at 6.1.2
+\define@key{sphinx}{div.topic_padding-top}{\def\spx@topic@padding@top{#1}}
+\define@key{sphinx}{div.topic_padding-right}{\def\spx@topic@padding@right{#1}}
+\define@key{sphinx}{div.topic_padding-bottom}{\def\spx@topic@padding@bottom{#1}}
+\define@key{sphinx}{div.topic_padding-left}{\def\spx@topic@padding@left{#1}}
+\define@key{sphinx}{div.topic_padding}{%
    \def\spx@topic@padding@top   {#1}%
    \let\spx@topic@padding@right \spx@topic@padding@top
    \let\spx@topic@padding@bottom\spx@topic@padding@top
@@ -460,7 +462,7 @@ will be set to white}%
 \let\spx@topic@padding@bottom\spx@topic@padding@top
 \let\spx@topic@padding@left  \spx@topic@padding@top
 \expandafter\let\expandafter\KV@sphinx@shadowsep
-                            \csname KV@sphinx@topic_padding\endcsname
+                            \csname KV@sphinx@div.topic_padding\endcsname
 %
 \define@key{sphinx}{div.topic_border-top-left-radius}{\def\spx@topic@radius@topleft{#1}}
 \define@key{sphinx}{div.topic_border-top-right-radius}{\def\spx@topic@radius@topright{#1}}
@@ -504,6 +506,7 @@ will be set to white}%
 \spx@topic@box@shadow@setter 4pt 4pt {} \@nnil
 % Suport for legacy shadowsize, the \sphinxshadowsize \dimen register
 % is not used anymore and should not even be allocated in future
+% This definition was broken at 5.1.0 and fixed at 6.1.2
 \define@key{sphinx}{shadowsize}{%
   \edef\spx@topic@shadow@xoffset{\number\dimexpr#1\relax sp}%
   \let\spx@topic@shadow@yoffset\spx@topic@shadow@xoffset