diff --git a/phpBB/adm/style/acp_forums.html b/phpBB/adm/style/acp_forums.html
index 4243fb8005..af79791ff8 100644
--- a/phpBB/adm/style/acp_forums.html
+++ b/phpBB/adm/style/acp_forums.html
@@ -285,11 +285,11 @@
 		</dl>
 		<dl>
 			<dt><label for="prune_shadow_freq">{L_AUTO_PRUNE_SHADOW_FREQ}{L_COLON}</label><br /><span>{L_AUTO_PRUNE_SHADOW_FREQ_EXPLAIN}</span></dt>
-			<dd><input type="number" id="prune_shadow_freq" name="prune_shadow_freq" value="{PRUNE_FREQ}" maxlength="4" size="4" min="0" max="9999" /> {L_DAYS}</dd>
+			<dd><input type="number" id="prune_shadow_freq" name="prune_shadow_freq" value="{PRUNE_SHADOW_FREQ}" maxlength="4" size="4" min="0" max="9999" /> {L_DAYS}</dd>
 		</dl>
 		<dl>
 			<dt><label for="prune_shadow_days">{L_AUTO_PRUNE_SHADOW_DAYS}{L_COLON}</label><br /><span>{L_AUTO_PRUNE_SHADOW_DAYS_EXPLAIN}</span></dt>
-			<dd><input type="number" id="prune_shadow_days" name="prune_shadow_days" value="{PRUNE_DAYS}" maxlength="4" size="4" min="0" max="9999" /> {L_DAYS}</dd>
+			<dd><input type="number" id="prune_shadow_days" name="prune_shadow_days" value="{PRUNE_SHADOW_DAYS}" maxlength="4" size="4" min="0" max="9999" /> {L_DAYS}</dd>
 		</dl>
 		</fieldset>
 	</div>