diff --git a/datenschleuder.cls b/datenschleuder.cls
index c3980d5..d3432bb 100644
--- a/datenschleuder.cls
+++ b/datenschleuder.cls
@@ -57,6 +57,17 @@
 	\else
 		\newcommand{\DSLogoFont}{\fontspec{FFNetwork}}
 	\fi
+\else
+	\ClassError{Datenschleuder}{%
+		You need LuaTeX in order to compile \MessageBreak
+  a Datenschleuder%
+	}{%
+		Instead of running "pdflatex \jobname" type:\MessageBreak
+		lualatex \jobname\MessageBreak
+		\MessageBreak
+		Remember to cross two fingers and praise Eris before compiling.\MessageBreak
+		Unpredictable things will happen with your computer otherwise...
+	}
 \fi
 
 \RequirePackage{fmtcount}