diff --git a/jungfrau/JFModuleGainCalibration.cpp b/jungfrau/JFModuleGainCalibration.cpp
index 234baea9..76f53992 100644
--- a/jungfrau/JFModuleGainCalibration.cpp
+++ b/jungfrau/JFModuleGainCalibration.cpp
@@ -8,25 +8,15 @@
 
 #include "../common/JFJochException.h"
 
-void JFModuleGainCalibration::SetPointers() {
-    gain_g0 = gain.data();
-    gain_g1 = gain.data() + RAW_MODULE_SIZE;
-    gain_g2 = gain.data() + 2 * RAW_MODULE_SIZE;
-}
-
 JFModuleGainCalibration::JFModuleGainCalibration() : gain(RAW_MODULE_SIZE * 3) {
-    SetPointers();
-
     for (int i = 0; i < RAW_MODULE_SIZE; i++) {
-        gain_g0[i] = DEFAULT_G0_FACTOR;
-        gain_g1[i] = DEFAULT_G1_FACTOR;
-        gain_g2[i] = DEFAULT_G2_FACTOR;
+        gain[i + offset_g0] = DEFAULT_G0_FACTOR;
+        gain[i + offset_g1] = DEFAULT_G1_FACTOR;
+        gain[i + offset_g2] = DEFAULT_G2_FACTOR;
     }
 }
 
 JFModuleGainCalibration::JFModuleGainCalibration(const std::string &filename) : gain(RAW_MODULE_SIZE * 3) {
-    SetPointers();
-
     std::ifstream file(filename.c_str(), std::fstream::binary);
     if (!file.is_open())
         throw JFJochException(JFJochExceptionCategory::GainFileOpenError, "Gain file cannot be opened");
@@ -43,7 +33,6 @@ JFModuleGainCalibration::JFModuleGainCalibration(const std::vector<double> &vec)
                               "Wrong size of input vector for gain calibration");
     }
     gain = vec;
-    SetPointers();
 }
 
 const std::vector<double> &JFModuleGainCalibration::GetGainCalibration() const {
@@ -52,17 +41,17 @@ const std::vector<double> &JFModuleGainCalibration::GetGainCalibration() const {
 
 void JFModuleGainCalibration::ExportG0(uint16_t *output) const {
     for (int i = 0; i < RAW_MODULE_SIZE; i++)
-        output[i] = to_fixed(GAIN_G0_MULTIPLIER / gain_g0[i], 14);
+        output[i] = to_fixed(GAIN_G0_MULTIPLIER / gain[offset_g0 + i], 14);
 }
 
 void JFModuleGainCalibration::ExportG1(uint16_t *output) const {
     for (int i = 0; i < RAW_MODULE_SIZE; i++)
-        output[i] = to_fixed(GAIN_G1_MULTIPLIER / gain_g1[i], 12);
+        output[i] = to_fixed(GAIN_G1_MULTIPLIER / gain[offset_g1 + i], 12);
 }
 
 void JFModuleGainCalibration::ExportG2(uint16_t *output) const {
     for (int i = 0; i < RAW_MODULE_SIZE; i++)
-        output[i] = to_fixed(GAIN_G2_MULTIPLIER / gain_g2[i], 10);
+        output[i] = to_fixed(GAIN_G2_MULTIPLIER / gain[offset_g2 + i], 10);
 }
 
 double JFModuleGainCalibration::GetMean(const double *ptr) {
@@ -73,13 +62,13 @@ double JFModuleGainCalibration::GetMean(const double *ptr) {
 }
 
 double JFModuleGainCalibration::GetG0Mean() const {
-    return GetMean(gain_g0);
+    return GetMean(gain.data() + offset_g0);
 }
 
 double JFModuleGainCalibration::GetG1Mean() const {
-    return GetMean(gain_g1);
+    return GetMean(gain.data() + offset_g1);
 }
 
 double JFModuleGainCalibration::GetG2Mean() const {
-    return GetMean(gain_g2);
+    return GetMean(gain.data() + offset_g2);
 }
diff --git a/jungfrau/JFModuleGainCalibration.h b/jungfrau/JFModuleGainCalibration.h
index 311e02bf..00e66f7e 100644
--- a/jungfrau/JFModuleGainCalibration.h
+++ b/jungfrau/JFModuleGainCalibration.h
@@ -12,11 +12,10 @@
 #include "../common/Definitions.h"
 
 class JFModuleGainCalibration {
+    constexpr const static size_t offset_g0 = 0;
+    constexpr const static size_t offset_g1 = RAW_MODULE_SIZE;
+    constexpr const static size_t offset_g2 = 2 * RAW_MODULE_SIZE;
     std::vector<double> gain;
-    double *gain_g0;
-    double *gain_g1;
-    double *gain_g2;
-    void SetPointers();
     static double GetMean(const double *ptr) ;
 public:
     JFModuleGainCalibration();