diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp
index 191c587d982..4a3ebf7a7c1 100644
--- a/drivers/gles3/rasterizer_storage_gles3.cpp
+++ b/drivers/gles3/rasterizer_storage_gles3.cpp
@@ -3862,7 +3862,7 @@ void RasterizerStorageGLES3::multimesh_allocate(RID p_multimesh, int p_instances
 
 		multimesh->data.resize(format_floats * p_instances);
 
-		for (int i = 0; i < p_instances; i += format_floats) {
+		for (int i = 0; i < p_instances * format_floats; i += format_floats) {
 
 			int color_from = 0;
 			int custom_data_from = 0;