diff --git a/HsH-classes.dtx b/HsH-classes.dtx
index 41c7630c197f61b40ebb07c8823eb15844bd86fd..eb8d99c6cbe39ebb31b97717314b70642cd629a7 100644
--- a/HsH-classes.dtx
+++ b/HsH-classes.dtx
@@ -141,7 +141,7 @@
 %% options for not loaded packages ----------------------------------------------------------------
 %
 %<article|report>\PassOptionsToPackage{backend=biber,style=alphabetic,sorting=nyt}{biblatex}
-\PassOptionsToPackage{free-standing-units,abbreviations}{siunitx}
+\PassOptionsToPackage{free-standing-units}{siunitx}
 \PassOptionsToPackage{european,EFvoltages,straightvoltages,betterproportions}{circuitikz}
 
 %</article|report|standalone>
diff --git a/src/HsH-article.cls b/src/HsH-article.cls
index f1de34f86a8121a2a6d20fab9be0d6a27c3a3489..508169ada08cfa98b691ddde6a514e8cee49304a 100644
--- a/src/HsH-article.cls
+++ b/src/HsH-article.cls
@@ -5,21 +5,21 @@
 %% The original source files were:
 %%
 %% HsH-classes.dtx  (with options: `article')
-%% 
+%%
 %% This is a generated file.
-%% 
+%%
 %% Copyright (C) 2021 by Jan Wille <mail@janwille.de>
-%% 
+%%
 %% This file may be distributed and/or modified under the conditions of
 %% the LaTeX Project Public License, either version 1.3 of this license
 %% or (at your option) any later version.  The latest version of this
 %% license is in:
-%% 
+%%
 %%    http://www.latex-project.org/lppl.txt
-%% 
+%%
 %% and version 1.3 or later is part of all distributions of LaTeX version
 %% 2021/01/01 or later.
-%% 
+%%
 \typeout{Adapted from KOMA script for use in Hochschule Hannover <2021-04-21> Jan Wille}
 \NeedsTeXFormat{LaTeX2e}
 \newcommand{\myClassName}{HsH-article}
@@ -95,7 +95,7 @@
 \RequirePackage{pgffor}
 %% options for not loaded packages ----------------------------------------------------------------
 \PassOptionsToPackage{backend=biber,style=alphabetic,sorting=nyt}{biblatex}
-\PassOptionsToPackage{free-standing-units,abbreviations}{siunitx}
+\PassOptionsToPackage{free-standing-units}{siunitx}
 \PassOptionsToPackage{european,EFvoltages,straightvoltages,betterproportions}{circuitikz}
 
 %% title matters ----------------------------------------------------------------------------------
diff --git a/src/HsH-report.cls b/src/HsH-report.cls
index e04f7520ce9e2f7309d67363a7bbee545e5c83d3..782cbd0b4c72bb3e9a43e50f62efc9e877bf0626 100644
--- a/src/HsH-report.cls
+++ b/src/HsH-report.cls
@@ -5,21 +5,21 @@
 %% The original source files were:
 %%
 %% HsH-classes.dtx  (with options: `report')
-%% 
+%%
 %% This is a generated file.
-%% 
+%%
 %% Copyright (C) 2021 by Jan Wille <mail@janwille.de>
-%% 
+%%
 %% This file may be distributed and/or modified under the conditions of
 %% the LaTeX Project Public License, either version 1.3 of this license
 %% or (at your option) any later version.  The latest version of this
 %% license is in:
-%% 
+%%
 %%    http://www.latex-project.org/lppl.txt
-%% 
+%%
 %% and version 1.3 or later is part of all distributions of LaTeX version
 %% 2021/01/01 or later.
-%% 
+%%
 \typeout{Adapted from KOMA script for use in Hochschule Hannover <2021-04-21> Jan Wille}
 \NeedsTeXFormat{LaTeX2e}
 \newcommand{\myClassName}{HsH-report}
@@ -95,7 +95,7 @@
 \RequirePackage{pgffor}
 %% options for not loaded packages ----------------------------------------------------------------
 \PassOptionsToPackage{backend=biber,style=alphabetic,sorting=nyt}{biblatex}
-\PassOptionsToPackage{free-standing-units,abbreviations}{siunitx}
+\PassOptionsToPackage{free-standing-units}{siunitx}
 \PassOptionsToPackage{european,EFvoltages,straightvoltages,betterproportions}{circuitikz}
 
 %% title matters ----------------------------------------------------------------------------------
diff --git a/src/HsH-standalone.cls b/src/HsH-standalone.cls
index 2ae116dd0c899d2453f335ba34094fff50d5d6bb..01e4b2e3f53280cb224f94f05a2843f51ed7a78f 100644
--- a/src/HsH-standalone.cls
+++ b/src/HsH-standalone.cls
@@ -5,21 +5,21 @@
 %% The original source files were:
 %%
 %% HsH-classes.dtx  (with options: `standalone')
-%% 
+%%
 %% This is a generated file.
-%% 
+%%
 %% Copyright (C) 2021 by Jan Wille <mail@janwille.de>
-%% 
+%%
 %% This file may be distributed and/or modified under the conditions of
 %% the LaTeX Project Public License, either version 1.3 of this license
 %% or (at your option) any later version.  The latest version of this
 %% license is in:
-%% 
+%%
 %%    http://www.latex-project.org/lppl.txt
-%% 
+%%
 %% and version 1.3 or later is part of all distributions of LaTeX version
 %% 2021/01/01 or later.
-%% 
+%%
 \typeout{Adapted from KOMA script for use in Hochschule Hannover <2021-04-21> Jan Wille}
 \NeedsTeXFormat{LaTeX2e}
 \newcommand{\myClassName}{HsH-standalone}
@@ -78,7 +78,7 @@
 \RequirePackage{amsmath}
 \if@german\RequirePackage{ziffer}\fi
 %% options for not loaded packages ----------------------------------------------------------------
-\PassOptionsToPackage{free-standing-units,abbreviations}{siunitx}
+\PassOptionsToPackage{free-standing-units}{siunitx}
 \PassOptionsToPackage{european,EFvoltages,straightvoltages,betterproportions}{circuitikz}
 
 %% typesetting indexes upright or standart
diff --git a/test.tex b/test.tex
index 9542069db3dbffa6cdec414e99ff72be9c8d9691..cd95176182f5a36545b9919980658af39aed05a1 100644
--- a/test.tex
+++ b/test.tex
@@ -51,7 +51,7 @@
 
 	noch ein test \normalsubscripts$R_t$ \upsubscripts$R_t$
 
-	mit einheit: $R=200\,\milli\ohm+ \SI{0.34567453}{\volt\per\metre}$
+	mit einheit: $R=200\,\mohm+ \SI{0.34567453}{\volt\per\metre}$
 	\cite{laboranleitung:physik}
 	\vspace{2cm}\\
 	eine zahl: $3,5+3.5$\footnote[1]{hello}\\