diff --git a/Makefile b/Makefile
index 8a4c8144896824f5fe744b391e40805164d331b3..04290151a282ff082c031fd48fd284f08807210a 100644
--- a/Makefile
+++ b/Makefile
@@ -26,8 +26,8 @@ all : commands
 preview : $(DST_ALL)
 
 # Pattern for slides (different parameters and template).
-motivation.html : motivation.md _layouts/slides.html
-	pandoc -s -t html \
+motivation.html : motivation.md _layouts/slides.revealjs
+	pandoc -s -t revealjs \
 	--template=_layouts/slides \
 	-o $@ $<
 
diff --git a/_layouts/slides.html b/_layouts/slides.revealjs
similarity index 100%
rename from _layouts/slides.html
rename to _layouts/slides.revealjs