diff --git a/src/Mayaqua/CMakeLists.txt b/src/Mayaqua/CMakeLists.txt
index ce7aadac..81fa61f2 100644
--- a/src/Mayaqua/CMakeLists.txt
+++ b/src/Mayaqua/CMakeLists.txt
@@ -32,6 +32,8 @@ target_link_libraries(mayaqua
     ZLIB::ZLIB
 )
 
+if(NOT WIN32)
+
 set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
 set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
 
@@ -44,6 +46,8 @@ if(NOT HAVE_OPENSSL_EVP_PKEY)
         message(FATAL_ERROR "required EVP_PKEY_get_raw_public_key() is not found in OpenSSL library")
 endif()
 
+endif()
+
 if(WIN32)
   set_target_properties(mayaqua
     PROPERTIES