diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b1358a..e88b70e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -200,6 +200,8 @@ endif ()
 
 add_library(TeaSpeak STATIC ${SOURCE_FILES} ${HEADER_FILES})
 target_link_libraries(TeaSpeak PUBLIC threadpool::static jsoncpp_lib)
+target_compile_options(TeaSpeak PRIVATE "-Wall")
+
 if (TEASPEAK_SERVER)
     target_link_libraries(TeaSpeak PUBLIC CXXTerminal::static)
 endif ()
diff --git a/src/protocol/CryptHandler.cpp b/src/protocol/CryptHandler.cpp
index b25058d..98b4d66 100644
--- a/src/protocol/CryptHandler.cpp
+++ b/src/protocol/CryptHandler.cpp
@@ -296,6 +296,8 @@ bool CryptHandler::encrypt(
     uint8_t tmp_buffer[tmp_buffer_size];
     size_t tag_length{8};
     uint8_t tag_buffer[16];
+
+    static_assert(sizeof(unsigned long) <= sizeof(tag_length));
     auto err = eax_encrypt_authenticate_memory(find_cipher("rijndael"),
                                           (uint8_t *) key.data(), /* the key */
                                           (unsigned long)    key.size(), /* key is 16 bytes */
@@ -309,7 +311,7 @@ bool CryptHandler::encrypt(
                                           (uint8_t *) tag_buffer,
                                           (unsigned long *)  &tag_length
     );
-    //assert(tag_length == 8);
+    assert(tag_length <= 16);
 
     if(err != CRYPT_OK) {
         error = "encrypt returned " + std::string{error_to_string(err)};