diff --git a/src/analyzer/protocol/ssl/SSL.cc b/src/analyzer/protocol/ssl/SSL.cc
index c7312466c8..32e7d6071b 100644
--- a/src/analyzer/protocol/ssl/SSL.cc
+++ b/src/analyzer/protocol/ssl/SSL.cc
@@ -374,7 +374,7 @@ bool SSL_Analyzer::TryDecryptApplicationData(int len, const u_char* data, bool i
 		EVP_DecryptUpdate(ctx, NULL, &decrypted_len, s_aead_tag.data(), s_aead_tag.size());
 		EVP_DecryptUpdate(ctx, decrypted.data(), &decrypted_len, (const u_char*)encrypted,
 		                  encrypted_len);
-		assert(decrypted_len <= decrypted.size());
+		assert(static_cast<decltype(decrypted.size())>(decrypted_len) <= decrypted.size());
 		decrypted.resize(decrypted_len);
 
 		int res = 0;