diff --git a/src/Type.zig b/src/Type.zig
index 2701d1a263024c4aa8af103143cf79e4459aae20..8b04fdae023dd058c4e4b9e1dce714cb611a7454 100644
--- a/src/Type.zig
+++ b/src/Type.zig
@@ -3175,6 +3175,7 @@ pub fn validateExtern(ty: Type, position: ExternPosition, zcu: *const Zcu) bool
         },
         .int => switch (ty.intInfo(zcu).bits) {
             0, 8, 16, 32, 64, 128 => true,
+            24, 48 => zcu.getTarget().cpu.arch == .ez80,
             else => false,
         },
         .@"fn" => {