diff --git a/pcsx2/Memory.h b/pcsx2/Memory.h
index 6b50e58428..a0544c28c3 100644
--- a/pcsx2/Memory.h
+++ b/pcsx2/Memory.h
@@ -22,11 +22,13 @@ namespace HostMemoryMap
 	// Main
 	//////////////////////////////////////////////////////////////////////////
 
-	// PS2 main memory, SPR, and ROMs (approximately 138.5MB, but we round up to 139MB for simplicity).
+	// PS2 main memory, SPR, and ROMs (approximately 142MB, but we round up to 144MB for simplicity).
+	// Needs to be big enough to fit the EEVM_MemoryAllocMess struct
 	static constexpr u32 EEmemOffset = 0x00000000;
-	static constexpr u32 EEmemSize = 0x8B00000;
+	static constexpr u32 EEmemSize = 0x9000000;
 
 	// IOP main memory (2MB + 64K + 256b, rounded up to 3MB for simplicity).
+	// Needs to be big enough to fit the IopVM_MemoryAllocMess struct
 	static constexpr u32 IOPmemOffset = EEmemOffset + EEmemSize;
 	static constexpr u32 IOPmemSize = 0x300000;
 
diff --git a/pcsx2/MemoryTypes.h b/pcsx2/MemoryTypes.h
index 3f550c46b4..cb04c60953 100644
--- a/pcsx2/MemoryTypes.h
+++ b/pcsx2/MemoryTypes.h
@@ -29,6 +29,7 @@ typedef u32 mem32_t;
 typedef u64 mem64_t;
 typedef u128 mem128_t;
 
+// Needs to fit within EEmemSize of Memory.h
 struct EEVM_MemoryAllocMess
 {
 	u8 Main[Ps2MemSize::MainRam];         // Main memory (hard-wired to 32MB)
@@ -47,6 +48,7 @@ struct EEVM_MemoryAllocMess
 	u8 ZeroWrite[_1mb];
 };
 
+// Needs to fit within IOPmemSize of Memory.h
 struct IopVM_MemoryAllocMess
 {
 	u8 Main[Ps2MemSize::IopRam]; // Main memory (hard-wired to 2MB)