diff --git a/themes/default/template/picture_nav_buttons.tpl b/themes/default/template/picture_nav_buttons.tpl
index a3b9547aa..0da5016d8 100644
--- a/themes/default/template/picture_nav_buttons.tpl
+++ b/themes/default/template/picture_nav_buttons.tpl
@@ -2,12 +2,12 @@
 {if $DISPLAY_NAV_BUTTONS or isset($slideshow)}
 {if isset($slideshow)}
 {if isset($slideshow.U_INC_PERIOD)}
-	<a href="{$slideshow.U_INC_PERIOD}" title="{'Accelerate diaporama speed'|@translate}" class="pwg-state-default pwg-button">
-		<span class="pwg-icon pwg-icon-clock-minus">&nbsp;</span><span class="pwg-button-text">{'Accelerate diaporama speed'|@translate}</span>
+	<a href="{$slideshow.U_INC_PERIOD}" title="{'Reduce diaporama speed'|@translate}" class="pwg-state-default pwg-button">
+		<span class="pwg-icon pwg-icon-clock-minus">&nbsp;</span><span class="pwg-button-text">{'Reduce diaporama speed'|@translate}</span>
 	</a>
 {else}
 	<span class="pwg-state-disabled pwg-button">
-		<span class="pwg-icon pwg-icon-clock-minus">&nbsp;</span><span class="pwg-button-text">{'Accelerate diaporama speed'|@translate}</span>
+		<span class="pwg-icon pwg-icon-clock-minus">&nbsp;</span><span class="pwg-button-text">{'Reduce diaporama speed'|@translate}</span>
 	</span>
 {/if}
 {if isset($slideshow.U_DEC_PERIOD)}