diff --git a/src/test/assembly/asm/nvptx-types.rs b/src/test/assembly/asm/nvptx-types.rs
index b36efe16c64a1..4ee79d1bcc839 100644
--- a/src/test/assembly/asm/nvptx-types.rs
+++ b/src/test/assembly/asm/nvptx-types.rs
@@ -30,6 +30,7 @@ impl Copy for i64 {}
 impl Copy for f64 {}
 impl Copy for ptr {}
 
+// NVPTX does not support static variables
 #[no_mangle]
 fn extern_func() {}