diff --git a/reactos/dll/win32/wdmaud.drv/legacy.c b/reactos/dll/win32/wdmaud.drv/legacy.c
index 6a8f777f2ad..1cfa858f924 100644
--- a/reactos/dll/win32/wdmaud.drv/legacy.c
+++ b/reactos/dll/win32/wdmaud.drv/legacy.c
@@ -668,6 +668,7 @@ WdmAudCommitWaveBufferByLegacy(
     if (Overlap->Standard.hEvent == NULL)
     {
         // no memory
+        HeapFree(GetProcessHeap(), 0, DeviceInfo);
         return MMSYSERR_NOMEM;
     }