diff --git a/dlls/netapi32/access.c b/dlls/netapi32/access.c
index 467c1249f45..fb630fca1bc 100644
--- a/dlls/netapi32/access.c
+++ b/dlls/netapi32/access.c
@@ -512,7 +512,7 @@ static void ACCESS_QueryGuestDisplayInformation(PNET_DISPLAY_USER *buf, PDWORD p
 /************************************************************
  * Copies NET_DISPLAY_USER record.
  */
-static void ACCESS_CopyDisplayUser(PNET_DISPLAY_USER dest, LPWSTR *dest_buf,
+static void ACCESS_CopyDisplayUser(const NET_DISPLAY_USER *dest, LPWSTR *dest_buf,
                             PNET_DISPLAY_USER src)
 {
     LPWSTR str = *dest_buf;
diff --git a/dlls/netapi32/nbt.c b/dlls/netapi32/nbt.c
index 27dba60a7af..a3e38ba59e8 100644
--- a/dlls/netapi32/nbt.c
+++ b/dlls/netapi32/nbt.c
@@ -288,7 +288,7 @@ typedef BOOL (*NetBTAnswerCallback)(void *data, WORD answerCount,
  * Returns NRC_GOODRET on timeout or a valid response received, something else
  * on error.
  */
-static UCHAR NetBTWaitForNameResponse(NetBTAdapter *adapter, SOCKET fd,
+static UCHAR NetBTWaitForNameResponse(const NetBTAdapter *adapter, SOCKET fd,
  DWORD waitUntil, NetBTAnswerCallback answerCallback, void *data)
 {
     BOOL found = FALSE;
@@ -424,7 +424,7 @@ static BOOL NetBTFindNameAnswerCallback(void *pVoid, WORD answerCount,
          queryData->cacheEntry->numAddresses < answerCount)
         {
             queryData->cacheEntry->addresses[queryData->cacheEntry->
-             numAddresses++] = *(PDWORD)(rData + 2);
+             numAddresses++] = *(const DWORD *)(rData + 2);
             ret = queryData->cacheEntry->numAddresses < answerCount;
         }
         else
@@ -444,7 +444,7 @@ static BOOL NetBTFindNameAnswerCallback(void *pVoid, WORD answerCount,
  * Returns NRC_GOODRET on success, though this may not mean the name was
  * resolved--check whether *cacheEntry is NULL.
  */
-static UCHAR NetBTNameWaitLoop(NetBTAdapter *adapter, SOCKET fd, PNCB ncb,
+static UCHAR NetBTNameWaitLoop(const NetBTAdapter *adapter, SOCKET fd, const NCB *ncb,
  DWORD sendTo, BOOL broadcast, DWORD timeout, DWORD maxQueries,
  NBNameCacheEntry **cacheEntry)
 {
@@ -1274,7 +1274,7 @@ static void NetBTCleanup(void)
     }
 }
 
-static UCHAR NetBTRegisterAdapter(PMIB_IPADDRROW ipRow)
+static UCHAR NetBTRegisterAdapter(const MIB_IPADDRROW *ipRow)
 {
     UCHAR ret;
     NetBTAdapter *adapter;
diff --git a/dlls/netapi32/netbios.c b/dlls/netapi32/netbios.c
index 3362f03a001..a55f5563162 100644
--- a/dlls/netapi32/netbios.c
+++ b/dlls/netapi32/netbios.c
@@ -640,7 +640,7 @@ static UCHAR nbInternalHangup(NetBIOSAdapter *adapter, NetBIOSSession *session)
     return NRC_GOODRET;
 }
 
-static UCHAR nbHangup(NetBIOSAdapter *adapter, PNCB ncb)
+static UCHAR nbHangup(NetBIOSAdapter *adapter, const NCB *ncb)
 {
     UCHAR ret;
     NetBIOSSession *session;
@@ -661,7 +661,7 @@ static UCHAR nbHangup(NetBIOSAdapter *adapter, PNCB ncb)
     return ret;
 }
 
-void NetBIOSHangupSession(PNCB ncb)
+void NetBIOSHangupSession(const NCB *ncb)
 {
     NetBIOSAdapter *adapter;
 
diff --git a/dlls/netapi32/netbios.h b/dlls/netapi32/netbios.h
index 7477410d59a..1279a5ad2fc 100644
--- a/dlls/netapi32/netbios.h
+++ b/dlls/netapi32/netbios.h
@@ -92,7 +92,7 @@ void NetBIOSEnumAdapters(ULONG transport, NetBIOSEnumAdaptersCallback cb,
  * This function is intended for use by a transport, if the session is closed
  * by some error in the transport layer.
  */
-void NetBIOSHangupSession(PNCB ncb);
+void NetBIOSHangupSession(const NCB *ncb);
 
 /**
  * Functions a transport implementation must implement
@@ -132,7 +132,7 @@ typedef void (*NetBIOSCleanup)(void);
  * some calls (recv) will block indefinitely, so a reset, shutdown, etc. will
  * never occur.
  */
-#define NCB_CANCELLED(pncb) *(PBOOL)((pncb)->ncb_reserve)
+#define NCB_CANCELLED(pncb) *(const BOOL *)((pncb)->ncb_reserve)
 
 typedef UCHAR (*NetBIOSAstat)(void *adapter, PNCB ncb);
 typedef UCHAR (*NetBIOSFindName)(void *adapter, PNCB ncb);
diff --git a/dlls/netapi32/wksta.c b/dlls/netapi32/wksta.c
index fbc4670d966..c51ef023cfd 100644
--- a/dlls/netapi32/wksta.c
+++ b/dlls/netapi32/wksta.c
@@ -71,7 +71,7 @@ BOOL NETAPI_IsLocalComputer(LPCWSTR ServerName)
     }
 }
 
-static void wprint_mac(WCHAR* buffer, int len, PMIB_IFROW ifRow)
+static void wprint_mac(WCHAR* buffer, int len, const MIB_IFROW *ifRow)
 {
     int i;
     unsigned char val;