--- php-5.2.0/configure.in.includedir

+++ php-5.2.0/configure.in

@@ -1242,7 +1242,7 @@

 EXPANDED_DATADIR=$datadir

 EXPANDED_PHP_CONFIG_FILE_PATH=`eval echo "$PHP_CONFIG_FILE_PATH"`

 EXPANDED_PHP_CONFIG_FILE_SCAN_DIR=`eval echo "$PHP_CONFIG_FILE_SCAN_DIR"`

-INCLUDE_PATH=.:$EXPANDED_PEAR_INSTALLDIR

+INCLUDE_PATH=.:$EXPANDED_PEAR_INSTALLDIR:${EXPANDED_DATADIR}/php

 exec_prefix=$old_exec_prefix

 libdir=$old_libdir