diff --git a/src/node.cc b/src/node.cc
index d760c7297..11c6a7de8 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -506,7 +506,7 @@ static Handle<Value> SetGid(const Arguments& args) {
   Local<Integer> given_gid = args[0]->ToInteger();
   int gid = given_gid->Int32Value();
   int result;
-  if ((result == setgid(gid)) != 0) {
+  if ((result = setgid(gid)) != 0) {
     return ThrowException(Exception::Error(String::New(strerror(errno))));
   }
   return Undefined();