diff --git a/include/llcc68_definitions.hpp b/include/llcc68_definitions.hpp
index fd95a96..00ca4ca 100644
--- a/include/llcc68_definitions.hpp
+++ b/include/llcc68_definitions.hpp
@@ -478,7 +478,7 @@ struct gfsk_parameters_t {
 	}
 
 	static constexpr gfsk_parameters_t
-	Gmsk100kFixed6(freq_t frequency_mhz  = 433.45,
+	Gmsk100kFixed6(freq_t frequency_mhz  = 434.18,
 				   tx_params_t tx_params = tx_params_t::Default()) {
 		return {
 			.mod_params =