diff --git a/reactos/base/applications/cmdutils/hostname/hostname.c b/reactos/base/applications/cmdutils/hostname/hostname.c
index b1c66713ce5..c118d2b575b 100644
--- a/reactos/base/applications/cmdutils/hostname/hostname.c
+++ b/reactos/base/applications/cmdutils/hostname/hostname.c
@@ -44,7 +44,7 @@ int main (int argc, char ** argv)
 			printf ("%s\n", ComputerName);
 			return EXIT_SUCCESS;
 		}
-		fprintf (stderr, "%s: Win32 error %ld.\n",
+		fprintf (stderr, "%s: Win32 error %lu.\n",
 			argv[0], GetLastError());
 		return EXIT_FAILURE;
 	}else{
diff --git a/reactos/base/applications/mscutils/eventvwr/eventvwr.c b/reactos/base/applications/mscutils/eventvwr/eventvwr.c
index 628eac0c505..f04b5118621 100644
--- a/reactos/base/applications/mscutils/eventvwr/eventvwr.c
+++ b/reactos/base/applications/mscutils/eventvwr/eventvwr.c
@@ -695,7 +695,7 @@ QueryEventMessages(LPWSTR lpMachineName,
     else
         _snwprintf(szWindowTitle+i, dwMaxLength, L"%s", lpComputerName);
 
-    swprintf(szStatusText, L"%s has %d event(s)", lpLogName, dwTotalRecords);
+    swprintf(szStatusText, L"%s has %lu event(s)", lpLogName, dwTotalRecords);
 
     // Update the status bar
     SendMessageW(hwndStatus, SB_SETTEXT, (WPARAM)0, (LPARAM)szStatusText);
diff --git a/reactos/base/applications/setup16/main.c b/reactos/base/applications/setup16/main.c
index 639cd98518e..a3b2ae40f04 100644
--- a/reactos/base/applications/setup16/main.c
+++ b/reactos/base/applications/setup16/main.c
@@ -143,7 +143,7 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
     else
     {
         WCHAR szMsg[MAX_PATH];
-        wsprintf(szMsg, L"Failed to load the installer. Error %d", GetLastError());
+        wsprintf(szMsg, L"Failed to load the installer. Error %lu", GetLastError());
         MessageBoxW(0, szMsg, L"Error", MB_OK | MB_ICONERROR);
         DeleteDirectory(szTempPath);
         return 1;
diff --git a/reactos/base/applications/shutdown/misc.c b/reactos/base/applications/shutdown/misc.c
index b26ff706e37..a245bfa37af 100644
--- a/reactos/base/applications/shutdown/misc.c
+++ b/reactos/base/applications/shutdown/misc.c
@@ -179,7 +179,7 @@ VOID DisplayError(DWORD dwError)
 
     /* Prints out the error message to the user */
     fprintf(stderr, resMsg);
-    fwprintf(stderr, L"Error code: %d\n", dwError);
+    fwprintf(stderr, L"Error code: %lu\n", dwError);
 
     LocalFree(lpMsgBuf);
     LocalFree(resMsg);