diff --git a/example/terminate_handler.cpp b/example/terminate_handler.cpp
index 11d8e75..3854ca3 100644
--- a/example/terminate_handler.cpp
+++ b/example/terminate_handler.cpp
@@ -219,7 +219,7 @@ int test_inplace() {
             return 51;
         }
 
-#ifndef !defined(BOOST_MSVC) && !defined(BOOST_STACKTRACE_USE_WINDBG)
+#if !defined(BOOST_MSVC) && !defined(BOOST_STACKTRACE_USE_WINDBG)
         // This is very dependent on compiler and link flags. No sane way to make it work, because
         // BOOST_NOINLINE could be ignored by MSVC compiler if link-time optimization is enabled.
         if (ss1 && ss1[0].name() != ss2[0].name()) {
diff --git a/test/test.cpp b/test/test.cpp
index 60d4007..62ea4b5 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -110,7 +110,7 @@ void test_comparisons_base(Bt nst, Bt st) {
     cst = cst;
     BOOST_TEST(nst);
     BOOST_TEST(st);
-#ifndef !defined(BOOST_MSVC) && !defined(BOOST_STACKTRACE_USE_WINDBG)
+#if !defined(BOOST_MSVC) && !defined(BOOST_STACKTRACE_USE_WINDBG)
     // This is very dependent on compiler and link flags. No sane way to make it work, because
     // BOOST_NOINLINE could be ignored by MSVC compiler if link-time optimization is enabled.
     BOOST_TEST(nst[0] != st[0]);