diff --git a/src/knx/platform.cpp b/src/knx/platform.cpp
index f622aef..d5d2b99 100644
--- a/src/knx/platform.cpp
+++ b/src/knx/platform.cpp
@@ -183,7 +183,7 @@ uint32_t Platform::writeNonVolatileMemory(uint32_t relativeAddress, uint8_t* buf
             uint32_t end = bufferedEraseBlockEnd();
 
             ptrdiff_t offset = relativeAddress - start;
-            ptrdiff_t length = min(end - relativeAddress, size);
+            ptrdiff_t length = std::min(end - relativeAddress, (uint32_t)size);
             memcpy(_eraseblockBuffer + offset, buffer, length);
             _bufferedEraseblockDirty = true;