diff --git a/PyTeX/format/enums.py b/PyTeX/format/enums.py
index cd43aeb..991d2a9 100644
--- a/PyTeX/format/enums.py
+++ b/PyTeX/format/enums.py
@@ -74,6 +74,7 @@ class FormatterProperty(MacroReplacementAtomIF, Enum):
     year = 'year'
     raw_name = 'raw_name'  # The 'raw' name of the package, without author prefix
     name = 'name'  # class or package name
+    file_prefix = 'file_prefix'
     version = 'version'
     file_name = 'file_name'
     source_file_name = 'source_file_name'
diff --git a/PyTeX/format/macros.py b/PyTeX/format/macros.py
index d374c69..169e977 100644
--- a/PyTeX/format/macros.py
+++ b/PyTeX/format/macros.py
@@ -23,7 +23,7 @@ class MacroReplacement:
         for arg in self.args:
             if type(arg) == FormatterProperty:
                 try:
-                    new_args.append(getattr(formatter, arg.value))
+                    new_args.append(formatter.attribute_dict[arg.value])
                 except:
                     raise NotImplementedError
             elif type(arg) == Argument:
diff --git a/PyTeX/format/pytex_formatter.py b/PyTeX/format/pytex_formatter.py
index a352809..48cdba9 100644
--- a/PyTeX/format/pytex_formatter.py
+++ b/PyTeX/format/pytex_formatter.py
@@ -151,6 +151,7 @@ class PyTeXFormatter(FormatterIF, ABC):
             FormatterProperty.pytex_dirty.value: self.git_version_info.pytex_version.dirty,
             FormatterProperty.tex_type.value: str(self.config.tex_type),
             FormatterProperty.tex_flavour.value: str(self.config.tex_flavour),
+            FormatterProperty.file_prefix.value: str(self.file_prefix)
         }
 
     @property
@@ -175,6 +176,18 @@ class PyTeXFormatter(FormatterIF, ABC):
         else:
             return parts[0]
 
+    @property
+    def file_prefix(self) -> str:
+        if self.config.naming_scheme == NamingScheme.prepend_author:
+            if self.config.tex_flavour == TeXFlavour.LaTeX2e:
+                return self.shortauthor + '@' + self.raw_name
+            elif self.config.tex_flavour == TeXFlavour.LaTeX3:
+                return self.shortauthor + '_' + self.raw_name
+            else:
+                raise NotImplementedError
+        else:
+            return self.raw_name
+
     @property
     def name(self):
         if self.config.naming_scheme == NamingScheme.prepend_author: