diff --git a/makefile-templates/Makefile.lecture b/makefile-templates/Makefile.lecture
index 4578f41..5e16437 100755
--- a/makefile-templates/Makefile.lecture
+++ b/makefile-templates/Makefile.lecture
@@ -119,7 +119,7 @@
 # We assume that shared infrastructure files are in the parent directory;
 # modify as necessary.
 #
-SLIDE_FILES=$(wildcard ../*.tex)
+SLIDE_FILES=$(wildcard ../*_slides.tex)
 
 #
 # List of images used in the presentation as backgrounds or watermarks.
@@ -129,7 +129,7 @@
 #
 # List of images used in the figures and examples document.
 #
-FIG_IMAGES=
+FIG_IMAGES=$(wildcard ../*_figures.tex)
 
 #
 # List of other files used in the figures and examples document.