diff --git a/src/knx/memory.cpp b/src/knx/memory.cpp
index 1948461..991f803 100644
--- a/src/knx/memory.cpp
+++ b/src/knx/memory.cpp
@@ -25,8 +25,7 @@ void Memory::readMemory()
 
     printHex("RESTORED ", flashStart, _metadataSize);
 
-    //uint16_t metadataBlockSize = alignToPageSize(_metadataSize);
-    uint16_t metadataBlockSize = _metadataSize;
+    uint16_t metadataBlockSize = alignToPageSize(_metadataSize);
 
     _freeList = new MemoryBlock(flashStart + metadataBlockSize, flashSize - metadataBlockSize);
 
@@ -175,7 +174,7 @@ void Memory::addSaveRestore(TableObject* obj)
 uint8_t* Memory::allocMemory(size_t size)
 {
     // always allocate aligned to pagesize
-    //size = alignToPageSize(size);
+    size = alignToPageSize(size);
 
     MemoryBlock* freeBlock = _freeList;
     MemoryBlock* blockToUse = nullptr;
@@ -375,12 +374,12 @@ void Memory::addToFreeList(MemoryBlock* block)
     }
 }
 
-//uint16_t Memory::alignToPageSize(size_t size)
-//{
-//    size_t pageSize = _platform.flashPageSize();
-//    // pagesize should be a multiply of two
-//    return (size + pageSize - 1) & (-1*pageSize);
-//}
+uint16_t Memory::alignToPageSize(size_t size)
+{
+    size_t pageSize = _platform.flashPageSize();
+    // pagesize should be a multiply of two
+    return (size + pageSize - 1) & (-1*pageSize);
+}
 
 MemoryBlock* Memory::findBlockInList(MemoryBlock* head, uint8_t* address)
 {
diff --git a/src/knx/memory.h b/src/knx/memory.h
index 6014ed4..8ebb5c2 100644
--- a/src/knx/memory.h
+++ b/src/knx/memory.h
@@ -46,7 +46,7 @@ public:
     void addToUsedList(MemoryBlock* block);
     void removeFromUsedList(MemoryBlock* block);
     void addToFreeList(MemoryBlock* block);
-//    uint16_t alignToPageSize(size_t size);
+    uint16_t alignToPageSize(size_t size);
     MemoryBlock* removeFromList(MemoryBlock* head, MemoryBlock* item);
     MemoryBlock* findBlockInList(MemoryBlock* head, uint8_t* address);
     void addNewUsedBlock(uint8_t* address, size_t size);
diff --git a/src/knx/platform.h b/src/knx/platform.h
index 1251d0e..be9a487 100644
--- a/src/knx/platform.h
+++ b/src/knx/platform.h
@@ -55,17 +55,16 @@ class Platform
     virtual void commitNonVolatileMemory();
     // address is relative to start of nonvolatile memory
     virtual uint32_t writeNonVolatileMemory(uint32_t relativeAddress, uint8_t* buffer, size_t size);
+    // size of one flash page in bytes
+    virtual size_t flashPageSize();
+
 
     NvMemoryType NonVolatileMemoryType();
     void NonVolatileMemoryType(NvMemoryType type);
 
   protected:
-    // Flash memory
-    
     // size of one EraseBlock in pages
     virtual size_t flashEraseBlockSize();
-    // size of one flash page in bytes
-    virtual size_t flashPageSize();
     // start of user flash aligned to start of an erase block
     virtual uint8_t* userFlashStart();
     // size of the user flash in EraseBlocks