diff --git a/llvm/include/llvm/module.modulemap b/llvm/include/llvm/module.modulemap
--- a/llvm/include/llvm/module.modulemap
+++ b/llvm/include/llvm/module.modulemap
@@ -119,6 +119,7 @@
   exclude header "DebugInfo/PDB/DIA/DIAEnumSourceFiles.h"
   exclude header "DebugInfo/PDB/DIA/DIAEnumSymbols.h"
   exclude header "DebugInfo/PDB/DIA/DIAEnumTables.h"
+  exclude header "DebugInfo/PDB/DIA/DIAError.h"
   exclude header "DebugInfo/PDB/DIA/DIAFrameData.h"
   exclude header "DebugInfo/PDB/DIA/DIAInjectedSource.h"
   exclude header "DebugInfo/PDB/DIA/DIALineNumber.h"