diff --git a/app/src/main/java/io/github/sspanak/tt9/preferences/screens/punctuation/PreferenceSpecialCharList.java b/app/src/main/java/io/github/sspanak/tt9/preferences/screens/punctuation/PreferenceSpecialCharList.java
index 210888bd..70a012c1 100644
--- a/app/src/main/java/io/github/sspanak/tt9/preferences/screens/punctuation/PreferenceSpecialCharList.java
+++ b/app/src/main/java/io/github/sspanak/tt9/preferences/screens/punctuation/PreferenceSpecialCharList.java
@@ -32,12 +32,8 @@ public class PreferenceSpecialCharList extends AbstractPreferenceCharList {
 			char[] mandatoryChars = getSettings().getMandatoryPunctuation(language);
 
 			forbiddenChars = new char[mandatoryChars.length + SettingsStore.FORBIDDEN_SPECIAL_CHARS.length];
-			for (char i = 0; i < mandatoryChars.length; i++) {
-				forbiddenChars[i] = mandatoryChars[i];
-			}
-			for (char i = 0; i < SettingsStore.FORBIDDEN_SPECIAL_CHARS.length; i++) {
-				forbiddenChars[i + mandatoryChars.length] = SettingsStore.FORBIDDEN_SPECIAL_CHARS[i];
-			}
+			System.arraycopy(mandatoryChars, 0, forbiddenChars, 0, mandatoryChars.length);
+			System.arraycopy(SettingsStore.FORBIDDEN_SPECIAL_CHARS, 0, forbiddenChars, mandatoryChars.length, SettingsStore.FORBIDDEN_SPECIAL_CHARS.length);
 		}
 
 		return forbiddenChars;