diff --git a/app/src/main/java/pl/lebihan/authnkey/PinInputField.kt b/app/src/main/java/pl/lebihan/authnkey/PinInputField.kt
index 7344f90..fb15889 100644
--- a/app/src/main/java/pl/lebihan/authnkey/PinInputField.kt
+++ b/app/src/main/java/pl/lebihan/authnkey/PinInputField.kt
@@ -91,7 +91,7 @@ class PinInputField @JvmOverloads constructor(
             error = null
             true
         } else {
-            error = context.getString(R.string.pin_too_short)
+            error = context.getString(R.string.pin_too_short, minPinLength)
             false
         }
     }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d32f13f..46f4d22 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -40,7 +40,7 @@
     <string name="pin_hint_new">New PIN</string>
     <string name="pin_hint_confirm">Confirm new PIN</string>
     <string name="pin_continue">Continue</string>
-    <string name="pin_too_short">PIN must be at least 4 characters</string>
+    <string name="pin_too_short">PIN must be at least %1$d characters</string>
     <string name="pin_retries_remaining">Enter PIN (%1$d retries remaining)</string>
     <string name="pin_incorrect_retries">Incorrect PIN. %1$d retries remaining</string>