diff --git a/src/openrct2/platform/Platform.Posix.cpp b/src/openrct2/platform/Platform.Posix.cpp
index 76606501d3..18ae7f50c0 100644
--- a/src/openrct2/platform/Platform.Posix.cpp
+++ b/src/openrct2/platform/Platform.Posix.cpp
@@ -379,11 +379,6 @@ namespace Platform
         return u8"app_285330" PATH_SEPARATOR u8"depot_285331";
     }
 
-    void Sleep(uint32_t ms)
-    {
-        usleep(ms * 1000);
-    }
-
     void InitTicks()
     {
     }
diff --git a/src/openrct2/platform/Platform.Win32.cpp b/src/openrct2/platform/Platform.Win32.cpp
index 85178dc975..9706056eff 100644
--- a/src/openrct2/platform/Platform.Win32.cpp
+++ b/src/openrct2/platform/Platform.Win32.cpp
@@ -912,11 +912,6 @@ namespace Platform
         return static_cast<uint32_t>(runningDelta.QuadPart / _frequency);
     }
 
-    void Sleep(uint32_t ms)
-    {
-        ::Sleep(ms);
-    }
-
     void InitTicks()
     {
         LARGE_INTEGER freq;