diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index d32d9dd..7aa2032 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -645,7 +645,7 @@
     mbedtls_test_message_queue* queue;
     mbedtls_mock_socket* socket;
     mbedtls_test_message_socket_context *context = (mbedtls_test_message_socket_context*) ctx;
-    size_t drop_len;
+    size_t drop_len = 0;
     size_t msg_len;
     int ret;