diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index e0e1d12a..12d81c1a 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -84,6 +84,7 @@
     <plurals name="delete_groups">
         <item quantity="one">%d grupę</item>
         <item quantity="few">%d grupy</item>
+        <item quantity="many">%d grup</item>
         <item quantity="other">%d grup</item>
     </plurals>
     <!-- FAQ -->
@@ -93,4 +94,4 @@
         Haven't found some strings? There's more at
         https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
     -->
-</resources>
+</resources>
\ No newline at end of file