diff --git a/Makefile.pre.in b/Makefile.pre.in
index 2285646..512185f 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -875,13 +875,13 @@
 frameworkinstallapps:
 	$(MAKE) -f $(srcdir)/Mac/OSX/Makefile installapps \
 		$(RUNSHARED) BUILDPYTHON=./$(BUILDPYTHON) DIRMODE=$(DIRMODE) FILEMODE=$(FILEMODE) \
-		srcdir=$(srcdir) builddir=. DESTDIR=$(DESTDIR)
+		srcdir=$(srcdir) builddir=. DESTDIR=$(DESTDIR) prefix=$(prefix)
 
 # This install the unix python and pythonw tools in /usr/local/bin
 frameworkinstallunixtools:
 	$(MAKE) -f $(srcdir)/Mac/OSX/Makefile installunixtools \
 		DIRMODE=$(DIRMODE) FILEMODE=$(FILEMODE) \
-		srcdir=$(srcdir) builddir=. DESTDIR=$(DESTDIR)
+		srcdir=$(srcdir) builddir=. DESTDIR=$(DESTDIR) prefix=$(prefix)
 
 # This installs the Demos and Tools into the applications directory.
 # It is not part of a normal frameworkinstall