diff --git a/kalibrierschein/kalibrierschein.cls b/kalibrierschein/kalibrierschein.cls
index 3d2bf412c7b183abd9935d503113f402409feafb..40271021287363abd58117925a82dbac39c22624 100644
--- a/kalibrierschein/kalibrierschein.cls
+++ b/kalibrierschein/kalibrierschein.cls
@@ -40,6 +40,7 @@ textwidth=489bp,
 textheight=669bp,
 top=85bp,
 headsep=0bp,
+head=12.85pt,%???
 footskip=0bp,
 ]{geometry}
 
diff --git a/kalibrierschein/siunitx-PTB.sty b/kalibrierschein/siunitx-PTB.sty
index 77f9957f7d6deea81cca725336b8e55b3e857f31..f09eb4fdda7323bbbb8bf2c5940c20edea9467d1 100644
--- a/kalibrierschein/siunitx-PTB.sty
+++ b/kalibrierschein/siunitx-PTB.sty
@@ -41,7 +41,13 @@
   ,tight-spacing = false
   ,separate-uncertainty
   %%%,inter-unit-product = \ensuremath{{}\cdot{}}
-}%
+  % weil default ( {}^{\circ} ) manchmal problematisch ("firamath"!?) 
+  ,text-degree = \textdegree
+  ,math-degree = \textdegree  
+  ,math-celsius = \textdegree\text{C}
+  ,text-celsius = \textdegree\text{C}
+}%     
+
 %%%}
 \AtBeginDocument{
   \sisetup{%