diff --git a/src/modules/launcher/PowerLauncher/App.xaml.cs b/src/modules/launcher/PowerLauncher/App.xaml.cs
index 9a714082d7..c036121d25 100644
--- a/src/modules/launcher/PowerLauncher/App.xaml.cs
+++ b/src/modules/launcher/PowerLauncher/App.xaml.cs
@@ -122,7 +122,7 @@ namespace PowerLauncher
         }
 
         [DllImport("kernel32.dll", SetLastError = true)]
-        public static extern IntPtr OpenProcess(uint processAccess, bool bInheritHandle, int processId);
+        private static extern IntPtr OpenProcess(uint processAccess, bool bInheritHandle, int processId);
 
         [DllImport("kernel32.dll", SetLastError = true)]
         private static extern uint WaitForSingleObject(IntPtr hHandle, uint dwMilliseconds);