diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index cb4470ea6..5c754009d 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -83,13 +83,11 @@ Sequence& Sequence::operator=(const Sequence& other) {
 }
 
 uint32_t Sequence::checksum() {
-  size_t dataLengthInBytes = 3*TextField::maxBufferSize()*sizeof(char);
-  assert((dataLengthInBytes & 0x3) == 0); // Assert that dataLengthInBytes is a multiple of 4
-  char data[3*TextField::maxBufferSize()] = {};
+  char data[k_dataLengthInBytes/sizeof(char)] = {};
   strlcpy(data, text(), TextField::maxBufferSize());
   strlcpy(data+TextField::maxBufferSize(), firstInitialConditionText(), TextField::maxBufferSize());
   strlcpy(data+2*TextField::maxBufferSize(), secondInitialConditionText(), TextField::maxBufferSize());
-  return Ion::crc32((uint32_t *)data, dataLengthInBytes>>2);
+  return Ion::crc32((uint32_t *)data, k_dataLengthInBytes>>2);
 }
 
 const char * Sequence::firstInitialConditionText() {
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index e794192b4..e24847d68 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -43,6 +43,8 @@ public:
 private:
   constexpr static int k_maxRecurrentRank = 10000;
   constexpr static float k_maxNumberOfTermsInSum = 100000.0f;
+  constexpr static size_t k_dataLengthInBytes = 3*TextField::maxBufferSize()*sizeof(char)+2;
+  static_assert((k_dataLengthInBytes & 0x3) == 0, "The sequence data size is not a multiple of 4 bytes (cannot compute crc)"); // Assert that dataLengthInBytes is a multiple of 4
   char symbol() const override;
   Type m_type;
   char m_firstInitialConditionText[TextField::maxBufferSize()];
diff --git a/apps/shared/function.cpp b/apps/shared/function.cpp
index c53c70e88..7e73f7fd2 100644
--- a/apps/shared/function.cpp
+++ b/apps/shared/function.cpp
@@ -27,11 +27,9 @@ Function& Function::operator=(const Function& other) {
 }
 
 uint32_t Function::checksum() {
-  size_t dataLengthInBytes = TextField::maxBufferSize()*sizeof(char);
-  assert((dataLengthInBytes & 0x3) == 0); // Assert that dataLengthInBytes is a multiple of 4
-  char data[TextField::maxBufferSize()] = {};
+  char data[k_dataLengthInBytes/sizeof(char)] = {};
   strlcpy(data, m_text, TextField::maxBufferSize());
-  return Ion::crc32((uint32_t *)data, dataLengthInBytes>>2);
+  return Ion::crc32((uint32_t *)data, k_dataLengthInBytes>>2);
 }
 
 void Function::setContent(const char * c) {
diff --git a/apps/shared/function.h b/apps/shared/function.h
index 1483d28a0..1acdae8ef 100644
--- a/apps/shared/function.h
+++ b/apps/shared/function.h
@@ -32,6 +32,8 @@ public:
 protected:
   mutable Poincare::Expression * m_expression;
 private:
+  constexpr static size_t k_dataLengthInBytes = TextField::maxBufferSize()*sizeof(char)+2;
+  static_assert((k_dataLengthInBytes & 0x3) == 0, "The function data size is not a multiple of 4 bytes (cannot compute crc)"); // Assert that dataLengthInBytes is a multiple of 4
   virtual char symbol() const = 0;
   char m_text[TextField::maxBufferSize()];
   const char * m_name;