diff --git a/src/node-curl.h b/src/node-curl.h
index 175e492..7fbecfd 100644
--- a/src/node-curl.h
+++ b/src/node-curl.h
@@ -81,7 +81,7 @@ class NodeCurlHttppost
 			last->contenttype = value;
 			break;
 		    case FILE:
-			last->flags |= HTTPPOST_FILENAME;
+			last->flags |= CURL_HTTPPOST_FILENAME;
 		    case CONTENTS:
 			last->contents = value;
 			last->contentslength = length;