diff --git a/plutosdr_source/src/main.cpp b/plutosdr_source/src/main.cpp
index 4a785f7c..6186da38 100644
--- a/plutosdr_source/src/main.cpp
+++ b/plutosdr_source/src/main.cpp
@@ -170,6 +170,7 @@ private:
         ImGui::SetNextItemWidth(menuWidth - ImGui::GetCursorPosX());
         if (_this->running) { style::beginDisabled(); }
         if (ImGui::InputFloat(CONCAT("##_samplerate_select_", _this->name), &_this->sampleRate, 1, 1000, 0)) {
+            _this->sampleRate = std::clamp<float>(_this->sampleRate, 500000, 61000000);
             core::setInputSampleRate(_this->sampleRate);
             config.aquire();
             config.conf["sampleRate"] = _this->sampleRate;