diff --git a/src/back/glsl/mod.rs b/src/back/glsl/mod.rs
index 5779fdcc6a..8b03644843 100644
--- a/src/back/glsl/mod.rs
+++ b/src/back/glsl/mod.rs
@@ -613,7 +613,7 @@ impl<'a, W: Write> Writer<'a, W> {
 
         // Write the array size
         // Writes nothing if `ArraySize::Dynamic`
-        // Panics if `ArraySize::Constant` has a constant that isn't an uint
+        // Panics if `ArraySize::Constant` has a constant that isn't an sint or uint
         match size {
             crate::ArraySize::Constant(const_handle) => {
                 match self.module.constants[const_handle].inner {
diff --git a/src/back/hlsl/writer.rs b/src/back/hlsl/writer.rs
index a5d97e8817..09db95b485 100644
--- a/src/back/hlsl/writer.rs
+++ b/src/back/hlsl/writer.rs
@@ -499,7 +499,7 @@ impl<'a, W: Write> Writer<'a, W> {
 
         // Write the array size
         // Writes nothing if `ArraySize::Dynamic`
-        // Panics if `ArraySize::Constant` has a constant that isn't an uint
+        // Panics if `ArraySize::Constant` has a constant that isn't an sint or uint
         match size {
             crate::ArraySize::Constant(const_handle) => {
                 match module.constants[const_handle].inner {