diff --git a/Makefile b/Makefile
index 6d2b59b0c04d648de1a17ed35a8d2dda527c5e07..b06646597f429e09727eac10a855cfb68d8da309 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 PANDOC ?= pandoc
+PANDOC_FLAGS = --smart
 
 # R Markdown files.
 SRC_RMD = $(wildcard ??-*.Rmd)
@@ -46,17 +47,19 @@ preview : $(DST_ALL)
 # Pattern for slides (different parameters and template).
 motivation.html : motivation.md _layouts/slides.revealjs Makefile
 	${PANDOC} -s -t revealjs --slide-level 2 \
-	--template=_layouts/slides \
-	-o $@ $<
+	    ${PANDOC_FLAGS} \
+	    --template=_layouts/slides \
+	    -o $@ $<
 
 # Pattern to build a generic page.
 %.html : %.md _layouts/page.html $(FILTERS)
 	${PANDOC} -s -t html \
-	--template=_layouts/page \
-	--filter=tools/filters/blockquote2div.py \
-	--filter=tools/filters/id4glossary.py \
-	$(INCLUDES) \
-	-o $@ $<
+	    ${PANDOC_FLAGS} \
+	    --template=_layouts/page \
+	    --filter=tools/filters/blockquote2div.py \
+	    --filter=tools/filters/id4glossary.py \
+	    $(INCLUDES) \
+	    -o $@ $<
 
 # Pattern to convert R Markdown to Markdown.
 %.md: %.Rmd $(R_CHUNK_OPTS)