diff --git a/src/engine/memorytable.cpp b/src/engine/memorytable.cpp
index 52ba609..6d91eb3 100644
--- a/src/engine/memorytable.cpp
+++ b/src/engine/memorytable.cpp
@@ -338,7 +338,7 @@ quint32 MemoryTablePrivate::allocate(quint32 size, TableMetadata *table, bool in

     // Align the allocation so that the header is directly accessible
     quint32 allocationSize = static_cast<quint32>(requiredSpace(size));
-    allocationSize = roundUp(allocationSize, sizeof(quint32));
+    allocationSize = roundUp(allocationSize, static_cast<quint32>(sizeof(quint32)));

     if (table->freeList) {
         // Try to reuse a freed block