--- debian/rules.defs	2007-06-23 07:21:47.000000000 +0000
+++ debian/rules.defs	2007-06-23 07:41:58.000000000 +0000
@@ -84,9 +84,9 @@
   # LS: Library Suffix. Used primarily at the end of cross compiler
   #     library package names (e.g. libgcc-powerpc-cross).
   DEB_TARGET_ALIAS ?= $(DEB_TARGET_GNU_TYPE)
-  TP = $(DEB_TARGET_GNU_TYPE)-
-  TS = -$(DEB_TARGET_ALIAS)
-  LS = -$(DEB_TARGET_ARCH)-cross
+  TP =  $(shell echo $(DEB_TARGET_GNU_TYPE) | tr '_' '-')-
+  TS = -$(shell echo $(DEB_TARGET_ALIAS)    | tr '_' '-')
+  LS = -$(shell echo $(DEB_TARGET_ARCH)     | tr '_' '-')-cross
 endif
 
 ifeq ($(DEB_CROSS),yes)