diff --git a/Source/sync.cpp b/Source/sync.cpp
index 197e8207b..eec751629 100644
--- a/Source/sync.cpp
+++ b/Source/sync.cpp
@@ -11,50 +11,7 @@ WORD sgwLRU[MAXMONSTERS];
 int sgnSyncItem;
 int sgnSyncPInv;
 
-DWORD sync_all_monsters(const BYTE *pbBuf, DWORD dwMaxLen)
-{
-	TSyncHeader *pHdr;
-	int i;
-	BOOL sync;
-
-	if (nummonsters < 1) {
-		return dwMaxLen;
-	}
-	if (dwMaxLen < sizeof(*pHdr) + sizeof(TSyncMonster)) {
-		return dwMaxLen;
-	}
-
-	pHdr = (TSyncHeader *)pbBuf;
-	pbBuf += sizeof(*pHdr);
-	dwMaxLen -= sizeof(*pHdr);
-
-	pHdr->bCmd = CMD_SYNCDATA;
-	pHdr->bLevel = currlevel;
-	pHdr->wLen = 0;
-	SyncPlrInv(pHdr);
-	assert(dwMaxLen <= 0xffff);
-	sync_one_monster();
-
-	for (i = 0; i < nummonsters && dwMaxLen >= sizeof(TSyncMonster); i++) {
-		sync = FALSE;
-		if (i < 2) {
-			sync = sync_monster_active2((TSyncMonster *)pbBuf);
-		}
-		if (!sync) {
-			sync = sync_monster_active((TSyncMonster *)pbBuf);
-		}
-		if (!sync) {
-			break;
-		}
-		pbBuf += sizeof(TSyncMonster);
-		pHdr->wLen += sizeof(TSyncMonster);
-		dwMaxLen -= sizeof(TSyncMonster);
-	}
-
-	return dwMaxLen;
-}
-
-void sync_one_monster()
+static void sync_one_monster()
 {
 	int i, m;
 
@@ -69,7 +26,19 @@ void sync_one_monster()
 	}
 }
 
-BOOL sync_monster_active(TSyncMonster *p)
+static void sync_monster_pos(TSyncMonster *p, int ndx)
+{
+	p->_mndx = ndx;
+	p->_mx = monster[ndx]._mx;
+	p->_my = monster[ndx]._my;
+	p->_menemy = encode_enemy(ndx);
+	p->_mdelta = sync_word_6AA708[ndx] > 255 ? 255 : sync_word_6AA708[ndx];
+
+	sync_word_6AA708[ndx] = 0xFFFF;
+	sgwLRU[ndx] = monster[ndx]._msquelch == 0 ? 0xFFFF : 0xFFFE;
+}
+
+static BOOL sync_monster_active(TSyncMonster *p)
 {
 	int i, m, ndx;
 	DWORD lru;
@@ -93,19 +62,7 @@ BOOL sync_monster_active(TSyncMonster *p)
 	return TRUE;
 }
 
-void sync_monster_pos(TSyncMonster *p, int ndx)
-{
-	p->_mndx = ndx;
-	p->_mx = monster[ndx]._mx;
-	p->_my = monster[ndx]._my;
-	p->_menemy = encode_enemy(ndx);
-	p->_mdelta = sync_word_6AA708[ndx] > 255 ? 255 : sync_word_6AA708[ndx];
-
-	sync_word_6AA708[ndx] = 0xFFFF;
-	sgwLRU[ndx] = monster[ndx]._msquelch == 0 ? 0xFFFF : 0xFFFE;
-}
-
-BOOL sync_monster_active2(TSyncMonster *p)
+static BOOL sync_monster_active2(TSyncMonster *p)
 {
 	int i, m, ndx;
 	DWORD lru;
@@ -133,7 +90,7 @@ BOOL sync_monster_active2(TSyncMonster *p)
 	return TRUE;
 }
 
-void SyncPlrInv(TSyncHeader *pHdr)
+static void SyncPlrInv(TSyncHeader *pHdr)
 {
 	int ii;
 	ItemStruct *pItem;
@@ -191,41 +148,50 @@ void SyncPlrInv(TSyncHeader *pHdr)
 	}
 }
 
-DWORD sync_update(int pnum, const BYTE *pbBuf)
+DWORD sync_all_monsters(const BYTE *pbBuf, DWORD dwMaxLen)
 {
 	TSyncHeader *pHdr;
-	WORD wLen;
-
-	pHdr = (TSyncHeader *)pbBuf;
-	pbBuf += sizeof(*pHdr);
+	int i;
+	BOOL sync;
 
-	if (pHdr->bCmd != CMD_SYNCDATA) {
-		app_fatal("bad sync command");
+	if (nummonsters < 1) {
+		return dwMaxLen;
+	}
+	if (dwMaxLen < sizeof(*pHdr) + sizeof(TSyncMonster)) {
+		return dwMaxLen;
 	}
 
-	/// ASSERT: assert(gbBufferMsgs != BUFFER_PROCESS);
+	pHdr = (TSyncHeader *)pbBuf;
+	pbBuf += sizeof(*pHdr);
+	dwMaxLen -= sizeof(*pHdr);
 
-	if (gbBufferMsgs == 1) {
-		return pHdr->wLen + sizeof(*pHdr);
-	}
-	if (pnum == myplr) {
-		return pHdr->wLen + sizeof(*pHdr);
-	}
+	pHdr->bCmd = CMD_SYNCDATA;
+	pHdr->bLevel = currlevel;
+	pHdr->wLen = 0;
+	SyncPlrInv(pHdr);
+	assert(dwMaxLen <= 0xffff);
+	sync_one_monster();
 
-	for (wLen = pHdr->wLen; wLen >= sizeof(TSyncMonster); wLen -= sizeof(TSyncMonster)) {
-		if (currlevel == pHdr->bLevel) {
-			sync_monster(pnum, (TSyncMonster *)pbBuf);
+	for (i = 0; i < nummonsters && dwMaxLen >= sizeof(TSyncMonster); i++) {
+		sync = FALSE;
+		if (i < 2) {
+			sync = sync_monster_active2((TSyncMonster *)pbBuf);
+		}
+		if (!sync) {
+			sync = sync_monster_active((TSyncMonster *)pbBuf);
+		}
+		if (!sync) {
+			break;
 		}
-		delta_sync_monster((TSyncMonster *)pbBuf, pHdr->bLevel);
 		pbBuf += sizeof(TSyncMonster);
+		pHdr->wLen += sizeof(TSyncMonster);
+		dwMaxLen -= sizeof(TSyncMonster);
 	}
 
-	assert(wLen == 0);
-
-	return pHdr->wLen + sizeof(*pHdr);
+	return dwMaxLen;
 }
 
-void sync_monster(int pnum, const TSyncMonster *p)
+static void sync_monster(int pnum, const TSyncMonster *p)
 {
 	int i, ndx, md, mdx, mdy;
 	DWORD delta;
@@ -287,6 +253,40 @@ void sync_monster(int pnum, const TSyncMonster *p)
 	decode_enemy(ndx, p->_menemy);
 }
 
+DWORD sync_update(int pnum, const BYTE *pbBuf)
+{
+	TSyncHeader *pHdr;
+	WORD wLen;
+
+	pHdr = (TSyncHeader *)pbBuf;
+	pbBuf += sizeof(*pHdr);
+
+	if (pHdr->bCmd != CMD_SYNCDATA) {
+		app_fatal("bad sync command");
+	}
+
+	/// ASSERT: assert(gbBufferMsgs != BUFFER_PROCESS);
+
+	if (gbBufferMsgs == 1) {
+		return pHdr->wLen + sizeof(*pHdr);
+	}
+	if (pnum == myplr) {
+		return pHdr->wLen + sizeof(*pHdr);
+	}
+
+	for (wLen = pHdr->wLen; wLen >= sizeof(TSyncMonster); wLen -= sizeof(TSyncMonster)) {
+		if (currlevel == pHdr->bLevel) {
+			sync_monster(pnum, (TSyncMonster *)pbBuf);
+		}
+		delta_sync_monster((TSyncMonster *)pbBuf, pHdr->bLevel);
+		pbBuf += sizeof(TSyncMonster);
+	}
+
+	assert(wLen == 0);
+
+	return pHdr->wLen + sizeof(*pHdr);
+}
+
 void sync_init()
 {
 	sgnMonsters = 16 * myplr;
diff --git a/Source/sync.h b/Source/sync.h
index 0ebccaea7..c667998a9 100644
--- a/Source/sync.h
+++ b/Source/sync.h
@@ -6,17 +6,7 @@
 #ifndef __SYNC_H__
 #define __SYNC_H__
 
-extern WORD sync_word_6AA708[MAXMONSTERS];
-extern int sgnMonsters;
-extern WORD sgwLRU[MAXMONSTERS];
-extern int sgnSyncItem;
-
 DWORD sync_all_monsters(const BYTE *pbBuf, DWORD dwMaxLen);
-void sync_one_monster();
-BOOL sync_monster_active(TSyncMonster *p);
-void sync_monster_pos(TSyncMonster *p, int ndx);
-BOOL sync_monster_active2(TSyncMonster *p);
-void SyncPlrInv(TSyncHeader *pHdr);
 DWORD sync_update(int pnum, const BYTE *pbBuf);
 void sync_monster(int pnum, const TSyncMonster *p);
 void sync_init();