diff --git a/doc.zih.tu-dresden.de/docs/software/singularity_recipe_hints.md b/doc.zih.tu-dresden.de/docs/software/singularity_recipe_hints.md
index c35130c25ff8ebe877ec8bbb0c1472af7a268d26..6f60c340c53b97da31529a4e21a4cf9b20761063 100644
--- a/doc.zih.tu-dresden.de/docs/software/singularity_recipe_hints.md
+++ b/doc.zih.tu-dresden.de/docs/software/singularity_recipe_hints.md
@@ -32,8 +32,9 @@ From: alpine
   cd ..
   rm -r fmt-5.3.0*
 
-  cat hello.cpp
-#include <fmt/format.h>
+  cat <<'EOF' >>  hello.cpp
+
+#include <fmt/format.h>  // literal
 
 int main(int argc, char** argv){
   if(argc == 1) fmt::print("No arguments passed!\n");