diff --git a/lib/Target/X86/Disassembler/CMakeLists.txt b/lib/Target/X86/Disassembler/CMakeLists.txt
index 2a83a9c2685..9f91060179e 100644
--- a/lib/Target/X86/Disassembler/CMakeLists.txt
+++ b/lib/Target/X86/Disassembler/CMakeLists.txt
@@ -4,4 +4,11 @@ add_llvm_library(LLVMX86Disassembler
   X86Disassembler.cpp
   X86DisassemblerDecoder.c
   )
+# workaround for hanging compilation on MSVC9
+if( MSVC_VERSION EQUAL 1500 )
+set_property(
+  SOURCE X86Disassembler.cpp
+  PROPERTY COMPILE_FLAGS "/Od"
+  )
+endif()
 add_dependencies(LLVMX86Disassembler X86CodeGenTable_gen)