diff --git a/scripts/rdf.py b/scripts/rdf.py
index a8d0795..f31daf9 100755
--- a/scripts/rdf.py
+++ b/scripts/rdf.py
@@ -21,14 +21,15 @@ g = Graph()
 
 def percent_encode(string):
     """
-    A few manpages contain special characters that are not valid symbols in a URL's
-    path. Since we use node URIs like <dokk:manpages:distro/package/name>, we need
-    to percent-encode these otherwise the URLs are invalid.
-    The reason for using a custom method instead of urllib.parse.quote() is that quote()
-    will percent-encode *any* non-ASCII character.
+    A few manpages contain special characters in their name that are not valid in a URL's
+    path. Since we use node URIs like <dokk:manpages:distro/package/name> we need to
+    %-encode these, otherwise the URLs are invalid.
+    The reason for using a custom method instead of urllib.parse.quote() is that urllib
+    only works with URLs but not IRIs, therefore quote() will %-encode *any* non-ASCII
+    character.
     """
 
-    return string.replace(' ', '_') \
+    return string.replace(' ', '%20') \
                  .replace('#', '%23') \
                  .replace('[', '%5B') \
                  .replace(']', '%5D')