--- a/OrthancStone/Sources/OpenGL/OpenGLProgram.h	Mon Sep 21 14:50:26 2020 +0200
+++ b/OrthancStone/Sources/OpenGL/OpenGLProgram.h	Mon Sep 21 17:46:39 2020 +0200
@@ -38,7 +38,7 @@
       // WARNING: A global OpenGL context must be active to create this object!
       // the context is only passed so that it can be checked for loss
       // when destructing the program resource
-      OpenGLProgram(OpenGL::IOpenGLContext& context);
+      explicit OpenGLProgram(OpenGL::IOpenGLContext& context);
 
       ~OpenGLProgram();
 
@@ -51,6 +51,7 @@
       GLint GetUniformLocation(const std::string& name);
 
       GLint GetAttributeLocation(const std::string& name);
+
     private:
       GLuint  program_;
       OpenGL::IOpenGLContext& context_;