diff --git a/unittests/ExecutionEngine/JIT/CMakeLists.txt b/unittests/ExecutionEngine/JIT/CMakeLists.txt
index ac45d2e24b9..ef37026dfc9 100644
--- a/unittests/ExecutionEngine/JIT/CMakeLists.txt
+++ b/unittests/ExecutionEngine/JIT/CMakeLists.txt
@@ -52,4 +52,7 @@ add_llvm_unittest(JITTests
   ${JITTestsSources}
   )
 
+if(MINGW OR CYGWIN)
+  set_property(TARGET JITTests PROPERTY LINK_FLAGS -Wl,--export-all-symbols)
+endif()
 set_target_properties(JITTests PROPERTIES ENABLE_EXPORTS 1)