diff --git a/reactos/base/system/services/groupdb.c b/reactos/base/system/services/groupdb.c
index fdd40fdf096..c5452ecd930 100644
--- a/reactos/base/system/services/groupdb.c
+++ b/reactos/base/system/services/groupdb.c
@@ -96,7 +96,7 @@ CreateGroupOrderListRoutine(PWSTR ValueName,
 {
     PSERVICE_GROUP Group;
 
-    DPRINT("CreateGroupOrderListRoutine(%S, %x, %x, %x, %x, %x)\n",
+    DPRINT("CreateGroupOrderListRoutine(%S, %x, %p, %x, %p, %p)\n",
            ValueName, ValueType, ValueData, ValueLength, Context, EntryContext);
 
     if (ValueType == REG_BINARY &&
@@ -172,7 +172,7 @@ CreateGroupListRoutine(PWSTR ValueName,
                                         QueryTable,
                                         (PVOID)Group,
                                         NULL);
-        DPRINT("%x %d %S\n", Status, Group->TagCount, (PWSTR)ValueData);
+        DPRINT("%x %lu %S\n", Status, Group->TagCount, (PWSTR)ValueData);
 
         InsertTailList(&GroupListHead,
                        &Group->GroupListEntry);
diff --git a/reactos/base/system/services/rpcserver.c b/reactos/base/system/services/rpcserver.c
index af6eed4aa1f..1e6b0e651aa 100644
--- a/reactos/base/system/services/rpcserver.c
+++ b/reactos/base/system/services/rpcserver.c
@@ -1619,7 +1619,7 @@ DWORD RSetServiceStatus(
     WCHAR szErrorBuffer[32];
 
     DPRINT("RSetServiceStatus() called\n");
-    DPRINT("hServiceStatus = %p\n", hServiceStatus);
+    DPRINT("hServiceStatus = %lu\n", hServiceStatus);
     DPRINT("dwServiceType = %lu\n", lpServiceStatus->dwServiceType);
     DPRINT("dwCurrentState = %lu\n", lpServiceStatus->dwCurrentState);
     DPRINT("dwControlsAccepted = %lu\n", lpServiceStatus->dwControlsAccepted);
diff --git a/reactos/base/system/services/services.c b/reactos/base/system/services/services.c
index 1245fd373ed..c24bc22a279 100644
--- a/reactos/base/system/services/services.c
+++ b/reactos/base/system/services/services.c
@@ -55,7 +55,7 @@ ScmLogError(DWORD dwEventId,
                                 L"Service Control Manager");
     if (hLog == NULL)
     {
-        DPRINT1("ScmLogEvent: RegisterEventSourceW failed %d\n", GetLastError());
+        DPRINT1("ScmLogEvent: RegisterEventSourceW failed %lu\n", GetLastError());
         return;
     }
 
@@ -69,7 +69,7 @@ ScmLogError(DWORD dwEventId,
                       lpStrings,
                       NULL))
     {
-        DPRINT1("ScmLogEvent: ReportEventW failed %d\n", GetLastError());
+        DPRINT1("ScmLogEvent: ReportEventW failed %lu\n", GetLastError());
     }
 
     DeregisterEventSource(hLog);
@@ -233,7 +233,7 @@ ScmCreateNamedPipe(VOID)
               NULL);
     if (hPipe == INVALID_HANDLE_VALUE)
     {
-        DPRINT("CreateNamedPipe() failed (%d)\n", GetLastError());
+        DPRINT("CreateNamedPipe() failed (%lu)\n", GetLastError());
         return FALSE;
     }
 
@@ -253,7 +253,7 @@ ScmCreateNamedPipe(VOID)
                                &dwThreadId);
         if (!hThread)
         {
-            DPRINT("Could not create thread (%d)\n", GetLastError());
+            DPRINT("Could not create thread (%lu)\n", GetLastError());
             DisconnectNamedPipe(hPipe);
             CloseHandle(hPipe);
             DPRINT("CreateNamedPipe() - returning FALSE\n");