diff --git a/ChangeLog b/ChangeLog
index 11d99646..4f4c71a4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-03-07  Jay Berkenbilt  <ejb@ql.org>
+
+	* Use ./install-sh (already present) instead of "install -c" to
+	install executables to fix portability problems against different
+	UNIX variants.
+
 2013-03-03  Jay Berkenbilt  <ejb@ql.org>
 
 	* Add protected terminateParsing method to
diff --git a/make/libtool.mk b/make/libtool.mk
index d1a19bc1..0d1d8bee 100644
--- a/make/libtool.mk
+++ b/make/libtool.mk
@@ -112,14 +112,14 @@ install: all
 	./mkinstalldirs $(DESTDIR)$(includedir)/qpdf
 	./mkinstalldirs $(DESTDIR)$(docdir)
 	./mkinstalldirs $(DESTDIR)$(mandir)/man1
-	$(LIBTOOL) --mode=install install -c \
+	$(LIBTOOL) --mode=install ./install-sh \
 		libqpdf/$(OUTPUT_DIR)/libqpdf.la \
 		$(DESTDIR)$(libdir)/libqpdf.la
 	$(LIBTOOL) --finish $(DESTDIR)$(libdir)
-	$(LIBTOOL) --mode=install install -c \
+	$(LIBTOOL) --mode=install ./install-sh \
 		qpdf/$(OUTPUT_DIR)/qpdf \
 		$(DESTDIR)$(bindir)/qpdf
-	$(LIBTOOL) --mode=install install -c \
+	$(LIBTOOL) --mode=install ./install-sh \
 		zlib-flate/$(OUTPUT_DIR)/zlib-flate \
 		$(DESTDIR)$(bindir)/zlib-flate
 	cp qpdf/fix-qdf $(DESTDIR)$(bindir)