diff --git a/CMakeLists.txt b/CMakeLists.txt
index ada880da..405f84fa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -450,7 +450,7 @@ endif()
 if(PY_VERSION VERSION_GREATER_EQUAL "3.8")
     option(WITH_DECIMAL_CONTEXTVAR "Build _decimal module using a coroutine-local rather than a thread-local context" ON)
 else()
-    if(DEFINED WITH_C_LOCALE_COERCION)
+    if(DEFINED WITH_DECIMAL_CONTEXTVAR)
         message(AUTHOR_WARNING "WITH_DECIMAL_CONTEXTVAR option is *NOT* supported with Python < 3.8. Current version is ${PY_VERSION}")
     endif()
 endif()