diff --git a/llvm/tools/llvm-shlib/CMakeLists.txt
 b/llvm/tools/llvm-shlib/CMakeLists.txt
--- a/llvm/tools/llvm-shlib/CMakeLists.txt
+++ b/llvm/tools/llvm-shlib/CMakeLists.txt
@@ -117,7 +117,7 @@
   list(REMOVE_DUPLICATES LIB_NAMES)
 
   # The python script needs to know whether symbols are prefixed with underscores or not.
-  if(LLVM_HOST_TRIPLE STREQUAL "i686-pc-win32")
+  if(LLVM_HOST_TRIPLE STREQUAL "i686-pc-windows-msvc")
     set(GEN_UNDERSCORE "--underscore")
   else()
     set(GEN_UNDERSCORE "")