diff -ur pjsip-0.5.10.4-orig/Makefile pjsip-0.5.10.4-fix/Makefile
--- pjsip-0.5.10.4-orig/Makefile	2007-08-07 20:29:59.000000000 +0100
+++ pjsip-0.5.10.4-fix/Makefile	2007-08-07 20:31:57.000000000 +0100
@@ -57,7 +57,7 @@
 		cp /tmp/id $$f; \
 	done
 
-prefix = /usr/local
+prefix = $(PREFIX)
 install:
 	mkdir -p $(DESTDIR)$(prefix)/lib
 	cp -L $$(find . -name '*.a') $(DESTDIR)$(prefix)/lib
diff -ur pjsip-0.5.10.4-orig/build.mak.in pjsip-0.5.10.4-fix/build.mak.in
--- pjsip-0.5.10.4-orig/build.mak.in	2007-08-07 20:30:15.000000000 +0100
+++ pjsip-0.5.10.4-fix/build.mak.in	2007-08-07 20:31:48.000000000 +0100
@@ -6,6 +6,7 @@
 export TARGET_NAME := @target@
 export CROSS_COMPILE := @ac_cross_compile@
 export LINUX_POLL := @ac_linux_poll@ 
+export PREFIX := @prefix@
 
 # Application can use this
 export PJDIR := @ac_pjdir@