diff --git a/code/AssetLib/glTF/glTFExporter.cpp b/code/AssetLib/glTF/glTFExporter.cpp
index c5f9ed08ad..b85affc083 100644
--- a/code/AssetLib/glTF/glTFExporter.cpp
+++ b/code/AssetLib/glTF/glTFExporter.cpp
@@ -536,7 +536,10 @@ void glTFExporter::ExportMeshes()
 
     // Variables needed for compression. BEGIN.
     // Indices, not pointers - because pointer to buffer is changing while writing to it.
+    size_t idx_srcdata_begin = 0; // Index of buffer before writing mesh data. Also, index of begin of coordinates array in buffer.
+    size_t idx_srcdata_normal = SIZE_MAX;// Index of begin of normals array in buffer. SIZE_MAX - mean that mesh has no normals.
     std::vector<size_t> idx_srcdata_tc;// Array of indices. Every index point to begin of texture coordinates array in buffer.
+    size_t idx_srcdata_ind;// Index of begin of coordinates indices array in buffer.
     bool comp_allow;// Point that data of current mesh can be compressed.
     // Variables needed for compression. END.