--- /dev/null
+--- php-5.2.0/configure.in.includedir
++++ php-5.2.0/configure.in
+@@ -1101,7 +1101,7 @@
+ 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