diff --git a/IV/Makefile b/IV/Makefile
index 149919f..374de69 100644
--- a/IV/Makefile
+++ b/IV/Makefile
@@ -13,6 +13,8 @@ SCALEDWIDTH = $(shell awk '/^TEXTWIDTH_CM/{print 25000/100*$$3}' layer2img.py)
 NON_ARCHIVABLES = notes.txt referatui.txt slides-2021-03-29.txt
 ARCHIVABLES = $(filter-out $(NON_ARCHIVABLES),$(shell git ls-files .))
 
+LISTINGS = aggregate-rivers.sql wm.sql extract-and-generate
+
 FIGURES = \
 		  test-figures \
 		  fig8-definition-of-a-bend \
@@ -66,8 +68,8 @@ slides: $(SLIDES)
 # The report, quick version
 ###########################
 
-mj-msc.pdf: mj-msc.tex version.inc.tex vars.inc.tex extract-and-generate bib.bib \
-	$(addsuffix .pdf,$(FIGURES)) $(addsuffix .pdf,$(RIVERS))
+mj-msc.pdf: mj-msc.tex version.inc.tex vars.inc.tex bib.bib \
+	$(LISTINGS) $(addsuffix .pdf,$(FIGURES)) $(addsuffix .pdf,$(RIVERS))
 	latexmk -shell-escape -g -pdf $<
 
 ############################
diff --git a/IV/aggregate-rivers.sql b/IV/aggregate-rivers.sql
index 22d7924..7fd1ec0 100644
--- a/IV/aggregate-rivers.sql
+++ b/IV/aggregate-rivers.sql
@@ -1,6 +1,10 @@
 /* Aggregates rivers by name and proximity. */
 drop function if exists aggregate_rivers;
-create function aggregate_rivers() returns table(osm_id bigint, name text, way geometry) as $$
+create function aggregate_rivers() returns table(
+  osm_id bigint,
+  name text,
+  way geometry
+) as $$
 declare
   c record;
   cc record;
@@ -12,7 +16,11 @@ begin
     changed = true;
     while changed loop
       changed = false;
-      for cc in (select * from wm_rivers_tmp a where a.name = c.name and st_dwithin(a.way, c.way, 500)) loop
+      for cc in (
+        select * from wm_rivers_tmp a where
+          a.name = c.name and
+          st_dwithin(a.way, c.way, 500)
+        ) loop
         c.way = st_linemerge(st_union(c.way, cc.way));
         delete from wm_rivers_tmp a where a.osm_id = cc.osm_id;
         changed = true;
@@ -36,5 +44,7 @@ insert into wm_rivers_tmp
     where waterway in ('river', 'stream', 'canal') and :where;
 
 drop table if exists wm_rivers;
-create table wm_rivers as (select * from aggregate_rivers() where st_length(way) >= 50000);
+create table wm_rivers as (
+  select * from aggregate_rivers() where st_length(way) >= 50000
+);
 drop table wm_rivers_tmp;
diff --git a/IV/mj-msc.tex b/IV/mj-msc.tex
index 337eb35..039cedd 100644
--- a/IV/mj-msc.tex
+++ b/IV/mj-msc.tex
@@ -854,10 +854,10 @@ Like explained in section~\ref{sec:reproducing-the-paper}, illustrations in
 
 \inputcode{bash}{extract-and-generate}
 
-\subsection{\texttt{ST\_SimplifyWV}}
+\subsection{Function \texttt{ST\_SimplifyWV}}
 \inputcode{postgresql}{wm.sql}
 
-\subsection{\texttt{aggregate\_rivers}}
+\subsection{Function \texttt{aggregate\_rivers}}
 \inputcode{postgresql}{aggregate-rivers.sql}
 
 \end{appendices}