diff --git a/firmware/baseband/proc_wideband_spectrum.cpp b/firmware/baseband/proc_wideband_spectrum.cpp
index e91121154..a5b6cd8a2 100644
--- a/firmware/baseband/proc_wideband_spectrum.cpp
+++ b/firmware/baseband/proc_wideband_spectrum.cpp
@@ -34,8 +34,6 @@ void WidebandSpectrum::execute(const buffer_c8_t& buffer) {
 	// 2048 complex8_t samples per buffer.
 	// 102.4us per buffer. 20480 instruction cycles per buffer.
 
-	static int phase = 0;
-
 	if( phase == 0 ) {
 		std::fill(spectrum.begin(), spectrum.end(), 0);
 	}
diff --git a/firmware/baseband/proc_wideband_spectrum.hpp b/firmware/baseband/proc_wideband_spectrum.hpp
index 72179633c..3aff0d3e5 100644
--- a/firmware/baseband/proc_wideband_spectrum.hpp
+++ b/firmware/baseband/proc_wideband_spectrum.hpp
@@ -43,6 +43,7 @@ private:
 	std::array<complex16_t, 256> spectrum;
 
 	void streaming_config(const SpectrumStreamingConfigMessage& message);
+	size_t phase = 0;
 };
 
 #endif/*__PROC_WIDEBAND_SPECTRUM_H__*/