diff --git a/Makefile.in b/Makefile.in
index 0adc24a5..bdfa4936 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -14,6 +14,9 @@ prefix		=@prefix@
 exec_prefix		=@exec_prefix@
 libdir		=$(exec_prefix)/lib
 includedir		=$(exec_prefix)/include
+pdcursesdir=$(srcdir)/pdcurses
+paneldir=$(srcdir)/panel
+demosdir=$(srcdir)/demos
 
 INSTALL		=$(srcdir)/install-sh
 RANLIB		=@RANLIB@
@@ -39,10 +42,10 @@ install:
 	$(INSTALL) -c -m 644 $(srcdir)/curses.h $(includedir)/xcurses.h
 	sed -e 's/#include <curses.h>/#include <xcurses.h>/' < $(srcdir)/panel.h > ./xpanel.h
 	$(INSTALL) -m 644 ./xpanel.h $(includedir)/xpanel.h
-	$(INSTALL) -c -m 644 pdcurses/libXCurses.a $(libdir)/libXCurses.a
+	$(INSTALL) -c -m 644 $(pdcursesdir)/libXCurses.a $(libdir)/libXCurses.a
 	-$(RANLIB) $(libdir)/libXCurses.a
-	$(INSTALL) -c -m 555 pdcurses/$(RXLIBPRE)$(SHLFILE)$(RXLIBPST) $(libdir)/$(RXLIBPRE)$(SHLFILE)$(RXLIBPST)
-	$(INSTALL) -c -m 644 panel/libpanel.a $(libdir)/libpanel.a
+	$(INSTALL) -c -m 555 $(pdcursesdir)/$(RXLIBPRE)$(SHLFILE)$(RXLIBPST) $(libdir)/$(RXLIBPRE)$(SHLFILE)$(RXLIBPST)
+	$(INSTALL) -c -m 644 $(paneldir)/libpanel.a $(libdir)/libpanel.a
 	-$(RANLIB) $(libdir)/libpanel.a
 
 clean ::