diff --git a/features_c2y.yaml b/features_c2y.yaml
index 9eeb3fd..60f0dc8 100644
--- a/features_c2y.yaml
+++ b/features_c2y.yaml
@@ -51,8 +51,14 @@ features:
   - desc: "Remove imaginary types"
     paper: N3274
     support:
+      - GCC
       - Clang
       - Xcode ?
+    hints:
+      - target: GCC
+        msg: "GCC has never supported imaginary types."
+      - target: Clang
+        msg: "Clang has never supported imaginary types."
 
   - desc: "Floating-point exceptions for macro replacements"
     paper: N3286