diff --git a/.gitignore b/.gitignore
index e35d8850..8141efa9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 _build
+include/sql/procedures.sql
+include/sql/exchange-0002.sql
+include/sql/exchange-0003.sql
+include/sql/exchange-0004.sql
diff --git a/include/sql/Makefile b/include/sql/Makefile
index dfcea0c1..3b6637dc 100644
--- a/include/sql/Makefile
+++ b/include/sql/Makefile
@@ -17,3 +17,12 @@ exchange-0004.sql: exchange-0004.sql.in 0004-*.sql
 	chmod +w $@ 2> /dev/null || true
 	gcc -E -P -undef - < exchange-0004.sql.in 2>/dev/null | sed -e "s/--.*//" | awk 'NF' - >$@
 	chmod ugo-w $@
+
+clean:
+	rm -f procedures.sql
+	rm -f exchange-0002.sql
+	rm -f exchange-0003.sql
+	rm -f exchange-0004.sql
+
+.DEFAULT_GOAL := all
+all: procedures.sql exchange-0002.sql exchange-0003.sql exchange-0004.sql