diff --git a/ptbposter/ptbposter-doc-1.pdf b/ptbposter/ptbposter-doc-1.pdf
index 96a84289c749559b6b6c96d00443c49a1053f16c..0da6e733daf822de36a4f44073d2398424a085a2 100644
Binary files a/ptbposter/ptbposter-doc-1.pdf and b/ptbposter/ptbposter-doc-1.pdf differ
diff --git a/ptbposter/ptbposter-doc-2.pdf b/ptbposter/ptbposter-doc-2.pdf
index 6bfc1cf7095ca3e294f2ae97bd72b732730ffe85..4151daa66b0220f8d7750a7c249dd926ded93ca9 100644
Binary files a/ptbposter/ptbposter-doc-2.pdf and b/ptbposter/ptbposter-doc-2.pdf differ
diff --git a/ptbposter/ptbposter.cls b/ptbposter/ptbposter.cls
index 8a9257704a14f0545abe2390caba134a3f76d978..cb78f74008506e79f0185942e24ea917f4636ed2 100644
--- a/ptbposter/ptbposter.cls
+++ b/ptbposter/ptbposter.cls
@@ -83,7 +83,7 @@
 \ifPTB@XeOrLua
   \RequirePackage[no-math]{fontspec}
   \RequirePackage{unicode-math}
-  \setromanfont[Ligatures=TeX]TeX Gyre Pagella}
+  \setromanfont[Ligatures=TeX]{TeX Gyre Pagella}
   \setsansfont[Ligatures=TeX]{TeX Gyre Heros}
   %\setmonofont[Scale=0.88]{DejaVu Sans Mono}
   %%%\setmonofont[Scale=1.05]{Latin Modern Mono}