diff --git a/config/baseconfig.mk b/config/baseconfig.mk
index 636b9aa..b350c75 100644
--- a/config/baseconfig.mk
+++ b/config/baseconfig.mk
@@ -1,7 +1,7 @@
 INCLUDED_AUTOCONF_MK = 1
 
-includedir := $(includedir)/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
-idldir = $(datadir)/idl/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
+includedir := $(includedir)/$(MOZ_APP_NAME)
+idldir = $(datadir)/idl/$(MOZ_APP_NAME)
 installdir = $(libdir)/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
 sdkdir = $(libdir)/$(MOZ_APP_NAME)-devel-$(MOZ_APP_VERSION)
 MOZILLA_SRCDIR = $(topsrcdir)/mozilla