diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b43a80..4c613cd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,7 +99,8 @@ endif()
 
 target_compile_options(yaml-cpp
   PRIVATE
-    $<${not-msvc}:-Wall -Wextra -Wshadow -Weffc++ -Wno-long-long>
+    $<${not-msvc}:-Wall -Wextra -Wshadow -Wno-long-long>
+    $<$<BOOL:${YAML_CPP_MASTER_PROJECT}>:-Weffc++>
     $<${not-msvc}:-pedantic -pedantic-errors>
 
     $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-static}>:-MTd>