diff --git a/src/Sema.zig b/src/Sema.zig
index 94db6e80b9ba314a1683adf450b166e9d4954de4..ff33f56c676645f34de705e4292e1740d2203fcc 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -6362,7 +6362,7 @@ fn zirAs(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Air.Inst
     defer tracy.end();
 
     const bin_inst = sema.code.instructions.items(.data)[inst].bin;
-    return sema.analyzeAs(block, .unneeded, bin_inst.lhs, bin_inst.rhs);
+    return sema.analyzeAs(block, sema.src, bin_inst.lhs, bin_inst.rhs);
 }
 
 fn zirAsNode(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Air.Inst.Ref {