diff --git a/lib/auth/sia/Makefile.in b/lib/auth/sia/Makefile.in
index ed3f5ebf5..5417192ba 100644
--- a/lib/auth/sia/Makefile.in
+++ b/lib/auth/sia/Makefile.in
@@ -23,9 +23,7 @@ libdir = $(exec_prefix)/lib
 
 PICFLAGS = @PICFLAGS@
  
-LIBNAME = libsia_krb4
-LIBEXT = so
-LIB = $(LIBNAME).$(LIBEXT)
+LIB = @SIA_LIB@
 
 SOURCES = sia.c