diff --git a/Sd1/swd1.xml b/Sd1/swd1.xml
index c680617d21afd8c3f43bba85955714f7e2e2d5a1..d6c17bed5d79793bd74ce216286e4cc685ed2b08 100644
--- a/Sd1/swd1.xml
+++ b/Sd1/swd1.xml
@@ -4323,7 +4323,7 @@ sin(4 * PI)=4518.2187229323445, difference=4518.2187229323445</programlisting>
 
                                 <m:mi>π</m:mi>
 
-                                <m:mo>⁢</m:mo>
+                                <m:mo>+</m:mo>
 
                                 <m:mi>x</m:mi>
                               </m:mrow>