diff --git a/ghc/rts/HeapStackCheck.cmm b/ghc/rts/HeapStackCheck.cmm
index 516d0ade7dfb90aa96669d92b8c82d1257fe6635..88d18063e23986e8b9de32fe28e5fab322100983 100644
--- a/ghc/rts/HeapStackCheck.cmm
+++ b/ghc/rts/HeapStackCheck.cmm
@@ -862,7 +862,7 @@ INFO_TABLE_RET( stg_block_async, 0/*framesize*/, 0/*bitmap*/, RET_SMALL )
 
     ares = StgTSO_block_info(CurrentTSO);
     len = StgAsyncIOResult_len(ares);
-    errC = StgAsyncIOResult_errC(ares);
+    errC = StgAsyncIOResult_errCode(ares);
     StgTSO_block_info(CurrentTSO) = NULL;
     foreign "C" free(ares);
     R1 = len;