diff --git a/dlls/winmm/mciavi/mciavi.c b/dlls/winmm/mciavi/mciavi.c
index cd863ddc623..d35ad174014 100644
--- a/dlls/winmm/mciavi/mciavi.c
+++ b/dlls/winmm/mciavi/mciavi.c
@@ -84,6 +84,7 @@ static DWORD CALLBACK	MCI_SCAStarter(LPVOID arg)
 static	DWORD MCI_SendCommandAsync(UINT wDevID, UINT wMsg, DWORD dwParam1,
                                   DWORD_PTR dwParam2, UINT size)
 {
+    HANDLE handle;
     struct SCA*	sca = HeapAlloc(GetProcessHeap(), 0, sizeof(struct SCA) + size);
 
     if (sca == 0)
@@ -103,10 +104,11 @@ static	DWORD MCI_SendCommandAsync(UINT wDevID, UINT wMsg, DWORD dwParam1,
 	sca->dwParam2 = dwParam2;
     }
 
-    if (CreateThread(NULL, 0, MCI_SCAStarter, sca, 0, NULL) == 0) {
+    if ((handle = CreateThread(NULL, 0, MCI_SCAStarter, sca, 0, NULL)) == 0) {
 	WARN("Couldn't allocate thread for async command handling, sending synchronously\n");
 	return MCI_SCAStarter(&sca);
     }
+    CloseHandle(handle);
     return 0;
 }
 
diff --git a/dlls/winmm/mciseq/mcimidi.c b/dlls/winmm/mciseq/mcimidi.c
index 846428b6058..dcc03874451 100644
--- a/dlls/winmm/mciseq/mcimidi.c
+++ b/dlls/winmm/mciseq/mcimidi.c
@@ -127,6 +127,7 @@ static DWORD CALLBACK	MCI_SCAStarter(LPVOID arg)
 static	DWORD MCI_SendCommandAsync(UINT wDevID, UINT wMsg, DWORD dwParam1,
 				   DWORD dwParam2, UINT size)
 {
+    HANDLE handle;
     struct SCA*	sca = HeapAlloc(GetProcessHeap(), 0, sizeof(struct SCA) + size);
 
     if (sca == 0)
@@ -146,10 +147,11 @@ static	DWORD MCI_SendCommandAsync(UINT wDevID, UINT wMsg, DWORD dwParam1,
 	sca->dwParam2 = dwParam2;
     }
 
-    if (CreateThread(NULL, 0, MCI_SCAStarter, sca, 0, NULL) == 0) {
+    if ((handle = CreateThread(NULL, 0, MCI_SCAStarter, sca, 0, NULL)) == 0) {
 	WARN("Couldn't allocate thread for async command handling, sending synchonously\n");
 	return MCI_SCAStarter(&sca);
     }
+    CloseHandle(handle);
     return 0;
 }
 
diff --git a/dlls/winmm/mciwave/mciwave.c b/dlls/winmm/mciwave/mciwave.c
index 9ef3430a298..fed84a7336c 100644
--- a/dlls/winmm/mciwave/mciwave.c
+++ b/dlls/winmm/mciwave/mciwave.c
@@ -97,6 +97,7 @@ static DWORD CALLBACK	MCI_SCAStarter(LPVOID arg)
 static	DWORD MCI_SendCommandAsync(UINT wDevID, UINT wMsg, DWORD dwParam1,
 				   DWORD dwParam2, UINT size)
 {
+    HANDLE handle;
     struct SCA*	sca = HeapAlloc(GetProcessHeap(), 0, sizeof(struct SCA) + size);
 
     if (sca == 0)
@@ -116,10 +117,11 @@ static	DWORD MCI_SendCommandAsync(UINT wDevID, UINT wMsg, DWORD dwParam1,
 	sca->dwParam2 = dwParam2;
     }
 
-    if (CreateThread(NULL, 0, MCI_SCAStarter, sca, 0, NULL) == 0) {
+    if ((handle = CreateThread(NULL, 0, MCI_SCAStarter, sca, 0, NULL)) == 0) {
 	WARN("Couldn't allocate thread for async command handling, sending synchonously\n");
 	return MCI_SCAStarter(&sca);
     }
+    CloseHandle(handle);
     return 0;
 }
 
diff --git a/dlls/winmm/playsound.c b/dlls/winmm/playsound.c
index 6854c65b78d..e2e928b8dc8 100644
--- a/dlls/winmm/playsound.c
+++ b/dlls/winmm/playsound.c
@@ -190,6 +190,7 @@ static void     PlaySound_Free(WINE_PLAYSOUND* wps)
     if (WINMM_IData->lpPlaySound == NULL) SetEvent(WINMM_IData->psLastEvent);
     LeaveCriticalSection(&WINMM_IData->cs);
     if (wps->bAlloc) HeapFree(GetProcessHeap(), 0, (void*)wps->pszSound);
+    if (wps->hThread) CloseHandle(wps->hThread);
     HeapFree(GetProcessHeap(), 0, wps);
 }
 
@@ -456,9 +457,12 @@ BOOL MULTIMEDIA_PlaySound(const void* pszSound, HMODULE hmod, DWORD fdwSound, BO
     if (fdwSound & SND_ASYNC)
     {
         DWORD       id;
+        HANDLE      handle;
         wps->bLoop = (fdwSound & SND_LOOP) ? TRUE : FALSE;
-        if (CreateThread(NULL, 0, proc_PlaySound, wps, 0, &id) != 0)
+        if ((handle = CreateThread(NULL, 0, proc_PlaySound, wps, 0, &id)) != 0) {
+            wps->hThread = handle;
             return TRUE;
+        }
     }
     else return proc_PlaySound(wps);
 
diff --git a/dlls/winmm/winemm.h b/dlls/winmm/winemm.h
index 5ed142365c1..1447cd1ba4d 100644
--- a/dlls/winmm/winemm.h
+++ b/dlls/winmm/winemm.h
@@ -193,6 +193,7 @@ typedef struct tagWINE_PLAYSOUND {
     LPCWSTR		        pszSound;
     HMODULE		        hMod;
     DWORD		        fdwSound;
+    HANDLE                      hThread;
     struct tagWINE_PLAYSOUND*   lpNext;
 } WINE_PLAYSOUND, *LPWINE_PLAYSOUND;