diff --git a/Makefile.defs b/Makefile.defs
index ab25b1db..59bf6c62 100644
--- a/Makefile.defs
+++ b/Makefile.defs
@@ -130,6 +130,7 @@ cfg-dir = etc/sems/
 bin-dir = sbin/
 modules-dir = lib/sems/plug-in/
 audio-dir = lib/sems/audio/
+lib-dir = lib/sems/
 
 ser-cfg-dir = etc/ser/
 
@@ -155,12 +156,14 @@ endif
 endif
 endif
 endif
+
 # target dirs for various stuff
 bin-target = $(prefix)/$(bin-dir)
 cfg-target = $(prefix)/$(cfg-dir)
 modules-target = $(prefix)/$(modules-dir)
 audio-target = $(prefix)/$(audio-dir)
 ser-cfg-target =$(ser-prefix)/$(ser-cfg-dir)
+lib-target = $(prefix)/$(lib-dir)
 
 ifeq ($(OS), solaris)
 #use GNU versions
diff --git a/core/plug-in/Makefile.app_module b/core/plug-in/Makefile.app_module
index a79673da..8ad24493 100644
--- a/core/plug-in/Makefile.app_module
+++ b/core/plug-in/Makefile.app_module
@@ -57,8 +57,8 @@ install-cfg:
 			$(INSTALL-TOUCH) $(cfg-prefix)/$(cfg-dir)$$r ; \
 			sed -e "s#/usr/.*lib/sems/audio/#$(audio-target)#g" \
 			-e "s#/usr/.*lib/sems/plug-in/#$(modules-target)#g" \
-			-e "s#/usr/.*lib/sems/ivr/#$(modules-prefix)/lib/sems/ivr/#g" \
-			-e "s#/usr/.*lib/sems/py_sems/#$(modules-prefix)/lib/sems/py_sems/#g" \
+			-e "s#/usr/.*lib/sems/ivr/#$(lib-target)ivr/#g" \
+			-e "s#/usr/.*lib/sems/py_sems/#$(lib-target)py_sems/#g" \
 			-e "s#/usr/.*etc/sems#$(cfg-target)#g" \
 			< $$r > $(cfg-prefix)/$(cfg-dir)$$r; \
 	done