diff --git a/LEGO1/mxvector.h b/LEGO1/mxvector.h
index ab30d2f5..ae58abd9 100644
--- a/LEGO1/mxvector.h
+++ b/LEGO1/mxvector.h
@@ -149,11 +149,11 @@ class MxVector3Data : public MxVector3
     };
   };
 
-  void CopyFrom(MxVector3Data *p_other) {
-    EqualsImpl(p_other->m_data);
+  void CopyFrom(MxVector3Data &p_other) {
+    EqualsImpl(p_other.m_data);
 
     float *dest = this->storage;
-    float *src = p_other->storage;
+    float *src = p_other.storage;
     for (size_t i = sizeof(storage) / sizeof(float); i > 0; --i)
       *dest++ = *src++; 
   }