diff --git a/makefile-templates/Makefile.lecture b/makefile-templates/Makefile.lecture
index a87d128..4578f41 100755
--- a/makefile-templates/Makefile.lecture
+++ b/makefile-templates/Makefile.lecture
@@ -116,8 +116,10 @@
 
 #
 # List of other files used in the presentation as actual content.
+# We assume that shared infrastructure files are in the parent directory;
+# modify as necessary.
 #
-SLIDE_FILES=
+SLIDE_FILES=$(wildcard ../*.tex)
 
 #
 # List of images used in the presentation as backgrounds or watermarks.