diff --git a/lib/tls/CMakeLists.txt b/lib/tls/CMakeLists.txt
index 77ec70778..f915596c6 100644
--- a/lib/tls/CMakeLists.txt
+++ b/lib/tls/CMakeLists.txt
@@ -341,8 +341,8 @@ CHECK_FUNCTION_EXISTS(${VARIA}ECDSA_SIG_set0 LWS_HAVE_ECDSA_SIG_set0 PARENT_SCOP
 CHECK_FUNCTION_EXISTS(${VARIA}BN_bn2binpad LWS_HAVE_BN_bn2binpad PARENT_SCOPE)
 CHECK_FUNCTION_EXISTS(${VARIA}EVP_aes_128_wrap LWS_HAVE_EVP_aes_128_wrap PARENT_SCOPE)
 CHECK_FUNCTION_EXISTS(${VARIA}EC_POINT_get_affine_coordinates LWS_HAVE_EC_POINT_get_affine_coordinates PARENT_SCOPE)
-CHECK_FUNCTION_EXISTS(${VARIA}SSL_CTX_load_verify_file LWS_HAVE_SSL_CTX_load_verify_file PARENT_SCOPE)
-CHECK_FUNCTION_EXISTS(${VARIA}SSL_CTX_load_verify_dir LWS_HAVE_SSL_CTX_load_verify_dir PARENT_SCOPE)
+CHECK_SYMBOL_EXISTS(${VARIA}SSL_CTX_load_verify_file LWS_HAVE_SSL_CTX_load_verify_file PARENT_SCOPE)
+CHECK_SYMBOL_EXISTS(${VARIA}SSL_CTX_load_verify_dir LWS_HAVE_SSL_CTX_load_verify_dir PARENT_SCOPE)
 endif()
 
 if (LWS_WITH_MBEDTLS)