diff --git a/Core/HLE/sceKernelMemory.cpp b/Core/HLE/sceKernelMemory.cpp
index 7aaf77cde5..939fbe0fe9 100644
--- a/Core/HLE/sceKernelMemory.cpp
+++ b/Core/HLE/sceKernelMemory.cpp
@@ -391,14 +391,14 @@ void __KernelMemoryShutdown()
 
 BlockAllocator *BlockAllocatorFromID(int id) {
 	switch (id) {
-	case 1:
+	case KERNEL_PARTITION_ID:
 	case 3:
 	case 4:
 		if (hleIsKernelMode())
 			return &kernelMemory;
 		return nullptr;
 
-	case 2:
+	case USER_PARTITION_ID:
 	case 6:
 		return &userMemory;
 
@@ -408,7 +408,7 @@ BlockAllocator *BlockAllocatorFromID(int id) {
 			return &userMemory;
 		return nullptr;
 
-	case 5:
+	case VSHELL_PARTITION_ID:
 		return &volatileMemory;
 
 	default:
@@ -420,11 +420,11 @@ BlockAllocator *BlockAllocatorFromID(int id) {
 
 int BlockAllocatorToID(const BlockAllocator *alloc) {
 	if (alloc == &kernelMemory)
-		return 1;
+		return KERNEL_PARTITION_ID;
 	if (alloc == &userMemory)
-		return 2;
+		return USER_PARTITION_ID;
 	if (alloc == &volatileMemory)
-		return 5;
+		return VSHELL_PARTITION_ID;
 	return 0;
 }
 
diff --git a/Core/HLE/sceKernelMemory.h b/Core/HLE/sceKernelMemory.h
index 2dff1dfe38..a65db34604 100644
--- a/Core/HLE/sceKernelMemory.h
+++ b/Core/HLE/sceKernelMemory.h
@@ -32,6 +32,16 @@ enum MemblockType {
 	PSP_SMEM_HighAligned = 4,
 };
 
+// Memory partition IDs, as passed to sceKernelAllocPartitionMemory() and friends.
+// Per TyRaNiD: 1 = kernel, 2 = user, 3 = me, 4 = kernel mirror. 5 is the "volatile"
+// partition also used by sceKernelVolatileMemLock() - the VSH uses this partition
+// for its own private allocations while it's running.
+enum {
+	KERNEL_PARTITION_ID = 1,
+	USER_PARTITION_ID = 2,
+	VSHELL_PARTITION_ID = 5,
+};
+
 extern BlockAllocator userMemory;
 extern BlockAllocator kernelMemory;
 
diff --git a/Core/HLE/sceNetAdhocMatching.cpp b/Core/HLE/sceNetAdhocMatching.cpp
index b3e0eea6f2..14ee4c73fc 100644
--- a/Core/HLE/sceNetAdhocMatching.cpp
+++ b/Core/HLE/sceNetAdhocMatching.cpp
@@ -1907,10 +1907,8 @@ int NetAdhocMatching_Start(int matchingId, int evthPri, int evthPartitionId, int
 	return hleLogDebug(Log::sceNet, 0);
 }
 
-#define KERNEL_PARTITION_ID  1
-#define USER_PARTITION_ID  2
-#define VSHELL_PARTITION_ID  5
 // This should be similar with sceNetAdhocMatchingStart2 but using USER_PARTITION_ID (2) for PartitionId params
+// (KERNEL_PARTITION_ID/USER_PARTITION_ID/VSHELL_PARTITION_ID come from Core/HLE/sceKernelMemory.h)
 static int sceNetAdhocMatchingStart(int matchingId, int evthPri, int evthStack, int inthPri, int inthStack, int optLen, u32 optDataAddr) {
 	WARN_LOG(Log::sceNet, "UNTESTED sceNetAdhocMatchingStart(%i, %i, %i, %i, %i, %i, %08x) at %08x", matchingId, evthPri, evthStack, inthPri, inthStack, optLen, optDataAddr, currentMIPS->pc);
 	if (!g_Config.bEnableWlan) {