diff --git a/apps/shared/storage_function.cpp b/apps/shared/storage_function.cpp
index d88630ac4..ac980af51 100644
--- a/apps/shared/storage_function.cpp
+++ b/apps/shared/storage_function.cpp
@@ -1,4 +1,5 @@
 #include "storage_function.h"
+#include <poincare/symbol.h>
 #include <string.h>
 #include <cmath>
 #include <assert.h>
diff --git a/apps/shared/storage_function_store.cpp b/apps/shared/storage_function_store.cpp
index ace60daaa..db57a5eb6 100644
--- a/apps/shared/storage_function_store.cpp
+++ b/apps/shared/storage_function_store.cpp
@@ -22,7 +22,7 @@ int StorageFunctionStore::numberOfActiveFunctions() const {
 }
 
 
-StorageFunction * StorageFunctionStore::activeFunctionAtIndex(int i) {
+StorageFunction * StorageFunctionStore::activeFunctionAtIndex(int i) const {
   assert(i >= 0 && i < numberOfDefinedModels());
   int index = 0;
   int currentModelIndex = 0;