diff --git a/meson.build b/meson.build
index de539eb..065be7f 100644
--- a/meson.build
+++ b/meson.build
@@ -274,6 +274,8 @@
     ]
     opt.add_cmake_defines(
         {
+            # 1.86.0 fails this.  Hopefully fixed in 1.86.1
+            'CMAKE_CXX_FLAGS': '-Wno-unused-parameter',
             'BOOST_INCLUDE_LIBRARIES': ';'.join(boost_libs),
             'BUILD_SHARED_LIBS': 'OFF',
         },