diff --git a/source/memory_mapping.cpp b/source/memory_mapping.cpp
index e24dfb7..aaa1ac4 100644
--- a/source/memory_mapping.cpp
+++ b/source/memory_mapping.cpp
@@ -395,9 +395,6 @@ void MemoryMapping_setupMemoryMapping() {
     OSInitMutex(&allocMutex);
 }
 
-#define ROUNDDOWN(val, align) ((val) & ~(align - 1))
-#define ROUNDUP(val, align)   ROUNDDOWN(((val) + (align - 1)), align)
-
 void *MemoryMapping_allocEx(uint32_t size, int32_t align, bool videoOnly) {
     OSLockMutex(&allocMutex);
     void *res = nullptr;
@@ -414,10 +411,7 @@ void *MemoryMapping_allocEx(uint32_t size, int32_t align, bool videoOnly) {
             continue;
         }
 
-        // We round up the size to avoid heap corruption.
-        // FSReadFile expects the buffer size to be a multiple of 0x40
-        // This can remove once all modules/plugins have been updated :)
-        res = MEMAllocFromExpHeapEx(heapHandle, ROUNDUP(size, 0x40), align);
+        res = MEMAllocFromExpHeapEx(heapHandle, (size + align - 1) & ~(align - 1), align);
         if (res != nullptr) {
             break;
         }