diff --git a/src/Utils/GLSLShader.cpp b/src/Utils/GLSLShader.cpp
index c1a3029738fdef6f4f3a5b4658cb60eb094b847c..6b857c68d4b1524ade87732e2275e37f6c73d4d4 100644
--- a/src/Utils/GLSLShader.cpp
+++ b/src/Utils/GLSLShader.cpp
@@ -1083,7 +1083,7 @@ void GLSLShader::enableVertexAttribs(unsigned int stride, unsigned int begin) co
 	{
 		glBindBuffer(GL_ARRAY_BUFFER, it->vbo_ptr->id());
 		glEnableVertexAttribArray(it->va_id);
-		glVertexAttribPointer(it->va_id, it->vbo_ptr->dataSize(), GL_FLOAT, false, stride, (const GLvoid*)begin);
+		glVertexAttribPointer(it->va_id, it->vbo_ptr->dataSize(), GL_FLOAT, false, stride, (const GLvoid*)((unsigned long)(begin)));
 	}
 //	this->unbind();
 }