diff --git a/libs/gfx/include/psemek/gfx/buffer.hpp b/libs/gfx/include/psemek/gfx/buffer.hpp
index 3cb3d273..eb25949e 100644
--- a/libs/gfx/include/psemek/gfx/buffer.hpp
+++ b/libs/gfx/include/psemek/gfx/buffer.hpp
@@ -21,6 +21,8 @@ namespace psemek::gfx
 
 		GLuint id() const { return id_; }
 
+		explicit operator bool() const { return id() != 0; }
+
 		void bind() const;
 
 		void reset();
diff --git a/libs/gfx/include/psemek/gfx/framebuffer.hpp b/libs/gfx/include/psemek/gfx/framebuffer.hpp
index e291a6a3..e5797ffe 100644
--- a/libs/gfx/include/psemek/gfx/framebuffer.hpp
+++ b/libs/gfx/include/psemek/gfx/framebuffer.hpp
@@ -21,6 +21,8 @@ namespace psemek::gfx
 
 		GLuint id() const { return id_; }
 
+		explicit operator bool() const { return id() != 0; }
+
 		void bind() const;
 
 		void reset();
diff --git a/libs/gfx/include/psemek/gfx/renderbuffer.hpp b/libs/gfx/include/psemek/gfx/renderbuffer.hpp
index ccef0dbf..0d11c192 100644
--- a/libs/gfx/include/psemek/gfx/renderbuffer.hpp
+++ b/libs/gfx/include/psemek/gfx/renderbuffer.hpp
@@ -21,6 +21,8 @@ namespace psemek::gfx
 
 		GLuint id() const { return id_; }
 
+		explicit operator bool() const { return id() != 0; }
+
 		void bind() const;
 
 		void reset();
diff --git a/libs/gfx/include/psemek/gfx/texture.hpp b/libs/gfx/include/psemek/gfx/texture.hpp
index 9681a713..f32e3586 100644
--- a/libs/gfx/include/psemek/gfx/texture.hpp
+++ b/libs/gfx/include/psemek/gfx/texture.hpp
@@ -27,12 +27,12 @@ namespace psemek::gfx
 
 		GLuint id() const { return id_; }
 
+		explicit operator bool() const { return id() != 0; }
+
 		void reset();
 
 		void bind() const;
 
-		explicit operator bool() const { return id() != 0; }
-
 		geom::vector<std::size_t, D> size() const { return size_; }
 
 		std::size_t width() const;