diff --git a/examples/php/run_greeter_client.sh b/examples/php/run_greeter_client.sh
index 1a6e9ee1010..4d0be4f24f5 100755
--- a/examples/php/run_greeter_client.sh
+++ b/examples/php/run_greeter_client.sh
@@ -30,5 +30,5 @@
 
 set -e
 cd $(dirname $0)
-php $extension_dir -d extension=grpc.so -d max_execution_time=300 \
+php -d extension=grpc.so -d max_execution_time=300 \
   greeter_client.php $1