diff --git a/app/spectrum.c b/app/spectrum.c
index 90a5b28..aa59a3b 100644
--- a/app/spectrum.c
+++ b/app/spectrum.c
@@ -62,17 +62,17 @@ const char *modulationTypeOptions[] = {" FM", " AM", "USB"};
 const uint8_t modulationTypeTuneSteps[] = {100, 50, 10};
 const uint8_t modTypeReg47Values[] = {1, 7, 5};
 
-SpectrumSettings settings = {STEPS_64,
-                             S_STEP_25_0kHz,
-                             80000,
-                             3200,
-                             150,
-                             true,
-                             BK4819_FILTER_BW_WIDE,
-                             BK4819_FILTER_BW_WIDE,
-                             false,
-                             -130,
-                             -50};
+SpectrumSettings settings = {stepsCount: STEPS_64,
+                             scanStepIndex: S_STEP_25_0kHz,
+                             frequencyChangeStep: 80000,
+                             scanDelay: 3200,
+                             rssiTriggerLevel: 150,
+                             backlightState: true,
+                             bw: BK4819_FILTER_BW_WIDE,
+                             listenBw: BK4819_FILTER_BW_WIDE,
+                             modulationType: false,
+                             dbMin: -130,
+                             dbMax: -50};
 
 uint32_t fMeasure = 0;
 uint32_t currentFreq, tempFreq;
diff --git a/app/spectrum.h b/app/spectrum.h
index d812dd0..8a97d3b 100644
--- a/app/spectrum.h
+++ b/app/spectrum.h
@@ -122,18 +122,21 @@ typedef enum ScanStep {
 } ScanStep;
 
 typedef struct SpectrumSettings {
+  uint32_t frequencyChangeStep;  
   StepsCount stepsCount;
   ScanStep scanStepIndex;
-  uint32_t frequencyChangeStep;
+
   uint16_t scanDelay;
   uint16_t rssiTriggerLevel;
 
-  bool backlightState;
+  
   BK4819_FilterBandwidth_t bw;
   BK4819_FilterBandwidth_t listenBw;
-  ModulationType modulationType;
   int dbMin;
-  int dbMax;
+  int dbMax;  
+  ModulationType modulationType;
+  bool backlightState;
+  uint8_t _pad[2];
 } SpectrumSettings;
 
 typedef struct KeyboardState {
@@ -148,6 +151,7 @@ typedef struct ScanInfo {
   uint32_t f, fPeak;
   uint16_t scanStep;
   uint8_t measurementsCount;
+  uint8_t _pad[1];
 } ScanInfo;
 
 typedef struct RegisterSpec {
@@ -156,13 +160,15 @@ typedef struct RegisterSpec {
   uint8_t offset;
   uint16_t maxValue;
   uint16_t inc;
+  uint8_t _pad[2];
 } RegisterSpec;
 
 typedef struct PeakInfo {
   uint16_t t;
   uint16_t rssi;
-  uint8_t i;
   uint32_t f;
+  uint8_t i;
+  uint8_t _pad[3];
 } PeakInfo;
 
 void APP_RunSpectrum(void);