diff --git a/WebCore/WebCore.pro b/WebCore/WebCore.pro
index 875f995..cc2140b 100644
--- a/WebCore/WebCore.pro
+++ b/WebCore/WebCore.pro
@@ -753,6 +753,8 @@
     html/HTMLButtonElement.cpp \
     html/HTMLCanvasElement.cpp \
     html/HTMLCollection.cpp \
+    html/HTMLDataGridElement.cpp \
+    html/HTMLDataGridColElement.cpp \
     html/HTMLDirectoryElement.cpp \
     html/HTMLDivElement.cpp \
     html/HTMLDListElement.cpp \