diff --git a/lib/AsmParser/Parser.cpp b/lib/AsmParser/Parser.cpp
index 331a233..aac4027 100644
--- a/lib/AsmParser/Parser.cpp
+++ b/lib/AsmParser/Parser.cpp
@@ -45,7 +45,8 @@
   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
   if (F == 0) {
     Err = SMDiagnostic("", -1, -1,
-                       "Could not open input file '" + Filename + "'", "");
+                       "Could not open input file '" + Filename + "': " +
+                       ErrorStr, "");
     return 0;
   }