diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 24c769c..5be44e5 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -40,6 +40,10 @@
   serialize_lit_param(target_triple "\"${TARGET_TRIPLE}\"")
 endif()
 
+if (LIBUNWIND_BUILD_32_BITS)
+  serialize_lit_param(enable_32bit True)
+endif()
+
 configure_lit_site_cfg(
   "${LIBUNWIND_TEST_CONFIG}"
   ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
diff --git a/test/lit.site.cfg.in b/test/lit.site.cfg.in
index 6f0c339..ef2ebd9 100644
--- a/test/lit.site.cfg.in
+++ b/test/lit.site.cfg.in
@@ -16,7 +16,6 @@
 config.llvm_unwinder            = True
 config.builtins_library         = "@LIBUNWIND_BUILTINS_LIBRARY@"
 config.enable_threads           = @LIBUNWIND_ENABLE_THREADS@
-config.enable_32bit             = @LIBUNWIND_BUILD_32_BITS@
 config.target_info              = "@LIBUNWIND_TARGET_INFO@"
 config.test_linker_flags        = "@LIBUNWIND_TEST_LINKER_FLAGS@"
 config.test_compiler_flags      = "@LIBUNWIND_TEST_COMPILER_FLAGS@"