diff --git a/src/shader.cpp b/src/shader.cpp
index a224c82b..62b7c99a 100644
--- a/src/shader.cpp
+++ b/src/shader.cpp
@@ -388,6 +388,12 @@ ShaderSource::ShaderSource(IrrlichtDevice *device):
 ShaderSource::~ShaderSource()
 {
 	//m_shader_callback->drop();
+
+	for (std::vector<IShaderConstantSetter*>::iterator iter = m_global_setters.begin();
+			iter != m_global_setters.end(); iter++) {
+		delete *iter;
+	}
+	m_global_setters.clear();
 }
 
 u32 ShaderSource::getShaderId(const std::string &name)
diff --git a/src/shader.h b/src/shader.h
index a7367eaf..a6256960 100644
--- a/src/shader.h
+++ b/src/shader.h
@@ -49,6 +49,7 @@ struct ShaderInfo
 	video::E_MATERIAL_TYPE material;
 
 	ShaderInfo(): name(""), material(video::EMT_SOLID) {}
+	virtual ~ShaderInfo() {}
 };
 
 /*