diff --git a/CMakeLists.txt b/CMakeLists.txt
index 28b5504..fca10c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,7 +51,10 @@ set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
 FetchContent_GetProperties(wolfssl)
 FetchContent_MakeAvailable(wolfssl)
 
-add_compile_definitions(WOLFSSL_ALT_NAMES WOLFSSL_ALPN)
+target_compile_definitions(wolfssl PUBLIC
+    -DWOLFSSL_ALT_NAMES
+    -DWOLFSSL_ALPN
+)
 
 # ---------------------
 # warnings