diff --git a/include/SDL_thread.h b/include/SDL_thread.h
index 49168c52f..be0601cc9 100644
--- a/include/SDL_thread.h
+++ b/include/SDL_thread.h
@@ -435,6 +435,10 @@ extern DECLSPEC void * SDLCALL SDL_TLSGet(SDL_TLSID id);
  */
 extern DECLSPEC int SDLCALL SDL_TLSSet(SDL_TLSID id, const void *value, void (SDLCALL *destructor)(void*));
 
+/**
+ *  \brief Cleanup all TLS data for this thread.
+ */
+extern DECLSPEC void SDLCALL SDL_TLSCleanup(void);
 
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus
diff --git a/src/dynapi/SDL_dynapi_overrides.h b/src/dynapi/SDL_dynapi_overrides.h
index 085156e8b..2d35d5f9b 100644
--- a/src/dynapi/SDL_dynapi_overrides.h
+++ b/src/dynapi/SDL_dynapi_overrides.h
@@ -809,3 +809,4 @@
 #define SDL_isgraph SDL_isgraph_REAL
 #define SDL_AndroidShowToast SDL_AndroidShowToast_REAL
 #define SDL_GetAudioDeviceSpec SDL_GetAudioDeviceSpec_REAL
+#define SDL_TLSCleanup SDL_TLSCleanup_REAL
diff --git a/src/dynapi/SDL_dynapi_procs.h b/src/dynapi/SDL_dynapi_procs.h
index 1cd285393..6d89825f0 100644
--- a/src/dynapi/SDL_dynapi_procs.h
+++ b/src/dynapi/SDL_dynapi_procs.h
@@ -874,3 +874,4 @@ SDL_DYNAPI_PROC(int,SDL_isgraph,(int a),(a),return)
 SDL_DYNAPI_PROC(int,SDL_AndroidShowToast,(const char *a, int b, int c, int d, int e),(a,b,c,d,e),return)
 #endif
 SDL_DYNAPI_PROC(int,SDL_GetAudioDeviceSpec,(int a, int b, SDL_AudioSpec *c),(a,b,c),return)
+SDL_DYNAPI_PROC(void,SDL_TLSCleanup,(void),(),)
diff --git a/src/thread/SDL_thread.c b/src/thread/SDL_thread.c
index 05c05ce49..438612c24 100644
--- a/src/thread/SDL_thread.c
+++ b/src/thread/SDL_thread.c
@@ -82,7 +82,7 @@ SDL_TLSSet(SDL_TLSID id, const void *value, void (SDLCALL *destructor)(void *))
     return 0;
 }
 
-static void
+void
 SDL_TLSCleanup()
 {
     SDL_TLSData *storage;