diff -burN centericq-4.9.6-orig/configure.in centericq-4.9.6-acfix/configure.in
--- centericq-4.9.6-orig/configure.in	2003-08-21 23:24:31.000000000 +0200
+++ centericq-4.9.6-acfix/configure.in	2003-09-02 10:12:27.682536280 +0200
@@ -99,10 +99,10 @@
 AC_CHECK_HEADERS([hash_map strstream ext/hash_map sstream],,)
 
 AC_CHECK_HEADERS(ext/hash_map,,
-  AC_CHECK_HEADERS(hash_map,, AC_MSG_ERROR([Your libstdc++ installation does not have the extra hash classes])))
+  [AC_CHECK_HEADERS(hash_map,, AC_MSG_ERROR([Your libstdc++ installation does not have the extra hash classes]))])
 
 AC_CHECK_HEADERS(sstream,,
-  AC_CHECK_HEADERS(strstream,, AC_MSG_ERROR([Your libstdc++ doesn't have the sstream or strstream classes])))
+  [AC_CHECK_HEADERS(strstream,, AC_MSG_ERROR([Your libstdc++ doesn't have the sstream or strstream classes]))])
 
 AC_CHECK_HEADERS(iconv.h)
 
diff -burN centericq-4.9.6-orig/libicq2000-0.1/configure.in centericq-4.9.6-acfix/libicq2000-0.1/configure.in
--- centericq-4.9.6-orig/libicq2000-0.1/configure.in	2003-04-05 19:47:36.000000000 +0200
+++ centericq-4.9.6-acfix/libicq2000-0.1/configure.in	2003-09-02 10:12:50.616049856 +0200
@@ -19,10 +19,10 @@
 AC_CHECK_HEADERS([hash_map strstream ext/hash_map sstream],,)
 
 AC_CHECK_HEADERS(ext/hash_map,,
-  AC_CHECK_HEADERS(hash_map,, AC_MSG_ERROR([Your libstdc++ installation does not have the extra hash classes])))
+  [AC_CHECK_HEADERS(hash_map,, AC_MSG_ERROR([Your libstdc++ installation does not have the extra hash classes]))])
 
 AC_CHECK_HEADERS(sstream,,
-  AC_CHECK_HEADERS(strstream,, AC_MSG_ERROR([Your libstdc++ doesn't have the sstream or strstream classes])))
+  [AC_CHECK_HEADERS(strstream,, AC_MSG_ERROR([Your libstdc++ doesn't have the sstream or strstream classes]))])
 
 AC_TRY_COMPILE([
     #include <sys/types.h>