diff --git a/php/ext/google/protobuf/protobuf.c b/php/ext/google/protobuf/protobuf.c
index 761eeeb53257..dbdd22a8f624 100644
--- a/php/ext/google/protobuf/protobuf.c
+++ b/php/ext/google/protobuf/protobuf.c
@@ -297,6 +297,7 @@ static PHP_MINIT_FUNCTION(protobuf) {
 }
 
 static PHP_MSHUTDOWN_FUNCTION(protobuf) {
+  UNREGISTER_INI_ENTRIES();
   return SUCCESS;
 }