diff --git a/source/Irrlicht/COBJMeshFileLoader.cpp b/source/Irrlicht/COBJMeshFileLoader.cpp
index 43ea51e..55565e1 100644
--- a/source/Irrlicht/COBJMeshFileLoader.cpp
+++ b/source/Irrlicht/COBJMeshFileLoader.cpp
@@ -83,7 +83,7 @@ IAnimatedMesh* COBJMeshFileLoader::createMesh(io::IReadFile* file)
 	bool mtlChanged=false;
 	bool useGroups = !SceneManager->getParameters()->getAttributeAsBool(OBJ_LOADER_IGNORE_GROUPS);
 	bool useMaterials = !SceneManager->getParameters()->getAttributeAsBool(OBJ_LOADER_IGNORE_MATERIAL_FILES);
-	irr::u32 lineNr = 1;	// only counts non-empty lines, still useful in debugging to locate errors
+	[[maybe_unused]] irr::u32 lineNr = 1;  // only counts non-empty lines, still useful in debugging to locate errors
 	core::array<int> faceCorners;
 	faceCorners.reallocate(32); // should be large enough
 	const core::stringc TAG_OFF = "off";