diff --git a/phpBB/styles/prosilver/template/posting_buttons.html b/phpBB/styles/prosilver/template/posting_buttons.html
index f09fd8259e..27a7481ad8 100644
--- a/phpBB/styles/prosilver/template/posting_buttons.html
+++ b/phpBB/styles/prosilver/template/posting_buttons.html
@@ -73,6 +73,11 @@
 		{{ Icon('iconify', 'mdi:link-variant', '', true, 'c-button-icon') }}
 	</button>
 	<!-- ENDIF -->
+	<!-- IF S_BBCODE_FLASH -->
+	<button type="button" class="button button-icon-only bbcode-flash" accesskey="d" name="addbbcode18" value="Flash" onclick="bbstyle(18)" title="{L_BBCODE_D_HELP}">
+		{{ Icon('iconify', 'fa:flash', '', true, 'c-button-icon') }}
+	</button>
+	<!-- ENDIF -->
 	<button type="button" class="button button-icon-only bbcode-color" name="bbpalette" id="bbpalette" value="{L_FONT_COLOR}" onclick="change_palette();" title="{L_BBCODE_S_HELP}">
 		{{ Icon('iconify', 'fa:tint', '', true, 'c-button-icon') }}
 	</button>