diff --git a/openair2/UTIL/OPT/probe.c b/openair2/UTIL/OPT/probe.c
index 25d1b6b1ec..06c02f1654 100644
--- a/openair2/UTIL/OPT/probe.c
+++ b/openair2/UTIL/OPT/probe.c
@@ -529,8 +529,9 @@ void trace_pdu_implementation(ws_trace_t *t)
 int init_opt(void) { 
   paramdef_t opt_params[]          = OPT_PARAMS_DESC ;
   checkedparam_t opt_checkParams[] = OPTPARAMS_CHECK_DESC;
+  static_assert(sizeofArray(opt_params) == sizeofArray(opt_checkParams),
+                "opt_params and opt_checkParams should have the same size");
   int sz=sizeofArray(opt_params);
-  AssertFatal(sz == sizeofArray(opt_checkParams), "Error in arrays size (%d!=%lu)\n", sz, sizeofArray(opt_checkParams));
   config_set_checkfunctions(opt_params, opt_checkParams, sz);
   config_get(config_get_if(), opt_params, sz, OPT_CONFIGPREFIX);
   subframesSinceCaptureStart = 0;