add Piotr P. Karwasz
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 708f503..6b29f06 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -353,6 +353,7 @@
Phillip Wells
Pierre Delisle
Pierre Dittgen
+Piotr P. Karwasz
Preston Bannister
Ralf Hergert
Rami Ojares
diff --git a/contributors.xml b/contributors.xml
index ddc55ec..6b25301 100644
--- a/contributors.xml
+++ b/contributors.xml
@@ -1461,6 +1461,10 @@
<last>Dittgen</last>
</name>
<name>
+ <first>Piotr</first>
+ <middle>P.</middle>
+ <last>Karwasz</last>
+ <name>
<first>Preston</first>
<last>Bannister</last>
</name>