diff --git a/doc/src/Makefile b/doc/src/Makefile
index ef93c8b6..c2c1a952 100644
--- a/doc/src/Makefile
+++ b/doc/src/Makefile
@@ -21,7 +21,6 @@ SRC = \
 	vmask.tex \
 	wio.tex
 
-mkinstalldirs = $(SHELL) ../../mkinstalldirs
 destdir = ../
 
 all: $(PDF) html
@@ -30,8 +29,8 @@ install: all $(PDF) html
 	-rm -rf ${destdir}/pdf/*.pdf
 	-rm -rf ${destdir}/html/vips*
 	-rm -rf ${destdir}/html/figs
-	$(mkinstalldirs) ${destdir}/pdf
-	$(mkinstalldirs) ${destdir}/html
+	-mkdir -p ${destdir}/pdf
+	-mkdir -p ${destdir}/html
 	-cp $(PDF) ${destdir}/pdf
 	-cp -r vipsmanual/* ${destdir}/html
 
diff --git a/libvips/resample/Makefile.am b/libvips/resample/Makefile.am
index bca986bb..8599054a 100644
--- a/libvips/resample/Makefile.am
+++ b/libvips/resample/Makefile.am
@@ -26,6 +26,7 @@ libresample_la_SOURCES = \
 	shrink.c \
 	affine.c \
 	interpolate.c \
+	quadratic.c \
 	transform.c 
 
 EXTRA_DIST = \