diff --git a/reactos/drivers/network/tcpip/include/titypes.h b/reactos/drivers/network/tcpip/include/titypes.h
index 7f5d1dfdb9c..e9380ffc030 100644
--- a/reactos/drivers/network/tcpip/include/titypes.h
+++ b/reactos/drivers/network/tcpip/include/titypes.h
@@ -13,6 +13,7 @@
  */
 #define ReferenceObject(Object)                            \
 {                                                          \
+    ASSERT((Object)->RefCount);                            \
     InterlockedIncrement(&((Object)->RefCount));           \
 }
 
@@ -22,6 +23,7 @@
  */
 #define DereferenceObject(Object)                           \
 {                                                           \
+    ASSERT((Object)->RefCount);                             \
     if (InterlockedDecrement(&((Object)->RefCount)) == 0)   \
         (((Object)->Free)(Object));                         \
 }