diff --git a/source/gfx/shader/gfx-shader-param.cpp b/source/gfx/shader/gfx-shader-param.cpp
index 88c9cef..4a0c688 100644
--- a/source/gfx/shader/gfx-shader-param.cpp
+++ b/source/gfx/shader/gfx-shader-param.cpp
@@ -18,6 +18,8 @@
 #include "gfx-shader-param.hpp"
 #include "gfx-shader-param-basic.hpp"
 
+void gfx::shader::parameter::defaults(obs_data_t* settings) {}
+
 void gfx::shader::parameter::properties(obs_properties_t* props, obs_data_t* settings) {}
 
 void gfx::shader::parameter::update(obs_data_t* settings) {}
diff --git a/source/gfx/shader/gfx-shader-param.hpp b/source/gfx/shader/gfx-shader-param.hpp
index 97badf0..b3838e0 100644
--- a/source/gfx/shader/gfx-shader-param.hpp
+++ b/source/gfx/shader/gfx-shader-param.hpp
@@ -42,6 +42,8 @@ namespace gfx {
 			virtual ~parameter(){};
 
 			public:
+			virtual void defaults(obs_data_t* settings);
+
 			virtual void properties(obs_properties_t* props, obs_data_t* settings);
 
 			virtual void update(obs_data_t* settings);