diff --git a/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde.java b/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde.java
index 9a20d9db6..5910059fc 100644
--- a/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde.java
+++ b/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde.java
@@ -34,7 +34,7 @@ public class Template_styles_nde implements Xox_xnde, Mwh_atr_itm_owner2 {
 		ctx.Para().Process_block__xnde(xnde.Tag(), Xop_xnde_tag.Block_bgn);
 		Xox_xnde_.Parse_xatrs(wiki, this, xatrs_hash, src, xnde);
 		// get css_ttl
-		css_ttl = wiki.Ttl_parse(css_ttl_bry);
+		css_ttl = css_ttl_bry == null ? null : wiki.Ttl_parse(css_ttl_bry); // must check for null ttl; EX:"<templatestyle src{{=}}A.css>"; PAGE:en.w:Switzerland; ISSUE#:416; DATE:2019-03-31
 		if (css_ttl == null) {
 			Gfo_usr_dlg_.Instance.Warn_many("", "", "Template_styles_nde.invalid_ttl: wiki=~{0} page=~{1} css_ttl=~{2}", wiki.Domain_bry(), ctx.Page().Url_bry_safe(), css_ttl_bry);
 			return;
diff --git a/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde_tst.java b/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde_tst.java
index 75e656d5b..4368bd260 100644
--- a/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde_tst.java
+++ b/400_xowa/src/gplx/xowa/xtns/template_styles/Template_styles_nde_tst.java
@@ -98,6 +98,13 @@ public class Template_styles_nde_tst {
 		, ""
 		);
 	}
+	@Test  public void Error__missing_src() {
+		fxt.Test__parse
+		( "<templatestyles src{{=}}'Missing.css'/>"// PAGE:en.w:Switzerland; ISSUE#:416; DATE:2019-03-31
+		, "<strong class=\"error\">Invalid title for TemplateStyles src attribute.</strong>"
+		, ""
+		);
+	}
 }
 class Template_styles_nde_fxt {
 	private final    Xop_fxt parser_fxt = new Xop_fxt();