diff --git a/src/fsfw/globalfunctions/math/VectorOperations.h b/src/fsfw/globalfunctions/math/VectorOperations.h
index 1e84330e..b8f6b00f 100644
--- a/src/fsfw/globalfunctions/math/VectorOperations.h
+++ b/src/fsfw/globalfunctions/math/VectorOperations.h
@@ -53,8 +53,9 @@ class VectorOperations {
     mulScalar(vector, 1 / norm(vector, size), normalizedVector, size);
   }
 
-  static T maxAbsValue(const T *vector, uint8_t size, uint8_t *index = 0) {
+  static T maxAbsValue(const T *vector, uint8_t size, uint8_t *index = nullptr) {
     T max = vector[size - 1];
+    uint8_t foundIndex = size - 1;
 
     for (; size > 0; size--) {
       T abs = vector[size - 1];
@@ -64,24 +65,35 @@ class VectorOperations {
       if (abs > max) {
         max = abs;
         if (index != 0) {
-          *index = size - 1;
+          foundIndex = size - 1;
         }
       }
     }
+
+    if (index != nullptr) {
+      *index = foundIndex;
+    }
+
     return max;
   }
 
-  static T maxValue(const T *vector, uint8_t size, uint8_t *index = 0) {
+  static T maxValue(const T *vector, uint8_t size, uint8_t *index = nullptr) {
     T max = vector[size - 1];
+    uint8_t foundIndex = size - 1;
 
     for (; size > 0; size--) {
       if (vector[size - 1] > max) {
         max = vector[size - 1];
         if (index != 0) {
-          *index = size - 1;
+          foundIndex = size - 1;
         }
       }
     }
+
+    if (index != nullptr) {
+      *index = foundIndex;
+    }
+
     return max;
   }