diff --git a/Makefile b/Makefile
index 15aaac0..a3f4fab 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,7 @@ HELP2MAN ?= help2man
 
 # Directories to place installed files.
 PREFIX ?= /usr/local
+LIBDIR ?= lib
 MAN1_DIR ?= man/man1
 
 # Default optimisation level (override by passing OPT=... in the make invocation)
@@ -204,7 +205,7 @@ clean:
 install: bins libs man
 	{ \
 		$(INSTALL) -Dm 644 -t $(DESTDIR)$(PREFIX)/bin/ $(BINS) ;\
-		$(INSTALL) -Dm 644 -t $(DESTDIR)$(PREFIX)/lib/ $(LIBS) ;\
+		$(INSTALL) -Dm 644 -t $(DESTDIR)$(PREFIX)/$(LIBDIR}/ $(LIBS) ;\
 		$(INSTALL) -Dm 644 -t $(DESTDIR)$(PREFIX)/include/ $(PUBLIC_HEADERS) ;\
 		$(INSTALL) -Dm 644 -t $(DESTDIR)$(PREFIX)/share/$(MAN1_DIR)/ $(MAN_PAGES) ;\
 	}