diff --git a/vulkano-shaders/src/descriptor_sets.rs b/vulkano-shaders/src/descriptor_sets.rs
index 764ac35ba..62e33b841 100644
--- a/vulkano-shaders/src/descriptor_sets.rs
+++ b/vulkano-shaders/src/descriptor_sets.rs
@@ -117,6 +117,7 @@ pub fn write_descriptor_sets(doc: &parse::Spirv) -> String {
                                                 ty: {desc_ty},
                                                 array_count: 1,
                                                 stages: ShaderStages::all(),        // TODO:
+                                                readonly: false,                    // TODO:
                                             }}", binding = d.binding, desc_ty = d.desc_ty)
                                })
                                .collect::<Vec<_>>();
diff --git a/vulkano/src/descriptor/descriptor.rs b/vulkano/src/descriptor/descriptor.rs
index 90c25087f..356535024 100644
--- a/vulkano/src/descriptor/descriptor.rs
+++ b/vulkano/src/descriptor/descriptor.rs
@@ -266,6 +266,9 @@ pub struct DescriptorDesc {
 
     /// Which shader stages are going to access this descriptor.
     pub stages: ShaderStages,
+
+    /// True if the attachment is only ever read by the shader. False if it is also written.
+    pub readonly: bool,
 }
 
 impl DescriptorDesc {
@@ -276,7 +279,8 @@ impl DescriptorDesc {
     #[inline]
     pub fn is_superset_of(&self, other: &DescriptorDesc) -> bool {
         self.binding == other.binding && self.ty == other.ty &&
-        self.array_count >= other.array_count && self.stages.is_superset_of(&other.stages)
+        self.array_count >= other.array_count && self.stages.is_superset_of(&other.stages) &&
+        (!self.readonly || other.readonly)
     }
 }
 
diff --git a/vulkano/src/descriptor/pipeline_layout/custom_pipeline_macro.rs b/vulkano/src/descriptor/pipeline_layout/custom_pipeline_macro.rs
index abf1aa8b6..75cb608e4 100644
--- a/vulkano/src/descriptor/pipeline_layout/custom_pipeline_macro.rs
+++ b/vulkano/src/descriptor/pipeline_layout/custom_pipeline_macro.rs
@@ -188,6 +188,7 @@ macro_rules! pipeline_layout {
                         ty: <$ty as DescriptorMarker>::descriptor_type(),
                         array_count: 1,                     // TODO:
                         stages: ShaderStages::all(),        // TODO:
+                        readonly: false,                    // TODO:
                     });
 
                     binding += 1;