--- old/src/java.desktop/windows/native/libawt/windows/awt_MouseEvent.cpp	2017-08-15 15:41:22.000000000 +0100
+++ new/src/java.desktop/windows/native/libawt/windows/awt_MouseEvent.cpp	2017-08-15 15:41:22.000000000 +0100
@@ -32,6 +32,7 @@
 
 jfieldID AwtMouseEvent::xID;
 jfieldID AwtMouseEvent::yID;
+jfieldID AwtMouseEvent::causedByTouchEventID;
 jfieldID AwtMouseEvent::buttonID;
 
 /************************************************************************
@@ -52,6 +53,11 @@
     DASSERT(AwtMouseEvent::yID != NULL);
     CHECK_NULL(AwtMouseEvent::yID);
 
+    AwtMouseEvent::causedByTouchEventID = env->GetFieldID(
+        cls, "causedByTouchEvent", "Z");
+    DASSERT(AwtMouseEvent::causedByTouchEventID != NULL);
+    CHECK_NULL(AwtMouseEvent::causedByTouchEventID);
+
     AwtMouseEvent::buttonID = env->GetFieldID(cls, "button", "I");
     DASSERT(AwtMouseEvent::buttonID != NULL);
     CHECK_NULL(AwtMouseEvent::buttonID);