diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index eaf99f8e2..7e01fe0b0 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -1175,7 +1175,8 @@ vec4 secondary_fragment_color = vec4(0.0);
         Core::Telemetry().AddField(Telemetry::FieldType::Session, "VideoCore_Pica_UseGasMode",
                                    true);
         LOG_CRITICAL(Render_OpenGL, "Unimplemented gas mode");
-        UNIMPLEMENTED();
+        out += "discard; }";
+        return out;
     }
 
     out += "gl_FragDepth = depth;\n";