diff --git a/panda/src/dxgsg8/dxIndexBufferContext8.cxx b/panda/src/dxgsg8/dxIndexBufferContext8.cxx
index cf4b8b2a6d..37e4e0b764 100644
--- a/panda/src/dxgsg8/dxIndexBufferContext8.cxx
+++ b/panda/src/dxgsg8/dxIndexBufferContext8.cxx
@@ -131,7 +131,7 @@ upload_data(const GeomPrimitivePipelineReader *reader) {
   }
 
   GraphicsStateGuardian::_data_transferred_pcollector.add_level(data_size);
-  memcpy(local_pointer, reader->get_read_pointer(), data_size);
+  memcpy(local_pointer, reader->get_read_pointer(true), data_size);
 
   _ibuffer->Unlock();
 }
diff --git a/panda/src/dxgsg8/dxVertexBufferContext8.cxx b/panda/src/dxgsg8/dxVertexBufferContext8.cxx
index 661192202c..ac91942d14 100644
--- a/panda/src/dxgsg8/dxVertexBufferContext8.cxx
+++ b/panda/src/dxgsg8/dxVertexBufferContext8.cxx
@@ -257,7 +257,7 @@ upload_data(const GeomVertexArrayDataHandle *reader) {
   }
 
   GraphicsStateGuardian::_data_transferred_pcollector.add_level(data_size);
-  memcpy(local_pointer, reader->get_read_pointer(), data_size);
+  memcpy(local_pointer, reader->get_read_pointer(true), data_size);
 
   _vbuffer->Unlock();
 }
diff --git a/panda/src/dxgsg9/dxIndexBufferContext9.cxx b/panda/src/dxgsg9/dxIndexBufferContext9.cxx
index 0b4d6d9eb5..fe331e2249 100755
--- a/panda/src/dxgsg9/dxIndexBufferContext9.cxx
+++ b/panda/src/dxgsg9/dxIndexBufferContext9.cxx
@@ -237,7 +237,7 @@ upload_data(const GeomPrimitivePipelineReader *reader) {
   }
 
   GraphicsStateGuardian::_data_transferred_pcollector.add_level(data_size);
-  memcpy(local_pointer, reader->get_read_pointer(), data_size);
+  memcpy(local_pointer, reader->get_read_pointer(true), data_size);
 
   _ibuffer->Unlock();
 }
diff --git a/panda/src/dxgsg9/dxVertexBufferContext9.cxx b/panda/src/dxgsg9/dxVertexBufferContext9.cxx
index fa50f4dad7..08df06e7d9 100755
--- a/panda/src/dxgsg9/dxVertexBufferContext9.cxx
+++ b/panda/src/dxgsg9/dxVertexBufferContext9.cxx
@@ -473,7 +473,7 @@ upload_data(const GeomVertexArrayDataHandle *reader) {
   }
 
   GraphicsStateGuardian::_data_transferred_pcollector.add_level(data_size);
-  memcpy(local_pointer, reader->get_read_pointer(), data_size);
+  memcpy(local_pointer, reader->get_read_pointer(true), data_size);
 
   _vbuffer->Unlock();
 }