diff --git a/crates/ide-completion/src/completions/attribute/cfg.rs b/crates/ide-completion/src/completions/attribute/cfg.rs
index 19bfd294b25c..a5af9affb9ce 100644
--- a/crates/ide-completion/src/completions/attribute/cfg.rs
+++ b/crates/ide-completion/src/completions/attribute/cfg.rs
@@ -46,6 +46,7 @@ const KNOWN_ARCH: [&str; 19] = [
     "aarch64",
     "arm",
     "avr",
+    "csky",
     "hexagon",
     "mips",
     "mips64",