diff --git a/tabs/configuration.html b/tabs/configuration.html
index 3f6cc6e6..6c53fc6b 100644
--- a/tabs/configuration.html
+++ b/tabs/configuration.html
@@ -51,7 +51,7 @@
                     <div class="number unsyncedpwmfreq" style="display: show; margin-top: 5px; border-bottom: 1px solid #ddd; padding-bottom: 10px;">
                         <label>
                             <div class="numberspacer">
-                                <input type="number" name="unsyncedpwmfreq" min="200" max="32000" />
+                                <input type="number" name="unsyncedpwmfreq" min="200" max="32000" step="100" />
                             </div>
                             <span i18n="configurationUnsyncedPWMFreq"></span>
                         </label>