--- xdelta-1.1.3/configure.in.orig	Sat Oct 19 11:45:54 2002
+++ xdelta-1.1.3/configure.in	Sat Oct 19 11:47:05 2002
@@ -28,9 +28,9 @@
   AC_MSG_ERROR(Test for GLIB failed. Download it from ftp://ftp.gtk.org/pub/gtk/v1.2/))
 
 AC_CHECK_LIB(z, gzsetparams,
-  AC_CHECK_HEADER(zlib.h,,
-    AC_MSG_ERROR(ZLIB headers not found)),
-  AC_MSG_ERROR(ZLIB library not found))
+  [AC_CHECK_HEADER(zlib.h,,
+    [AC_MSG_ERROR(ZLIB headers not found)])],
+  [AC_MSG_ERROR(ZLIB library not found)])
 
 AC_OUTPUT(Makefile
 	  doc/Makefile