diff --git a/dll/win32/winemp3.acm/mpegl3.c b/dll/win32/winemp3.acm/mpegl3.c
index 15acdeaad58..b28519f835a 100644
--- a/dll/win32/winemp3.acm/mpegl3.c
+++ b/dll/win32/winemp3.acm/mpegl3.c
@@ -21,12 +21,12 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include <config.h>
-//#include "wine/port.h"
+#include "config.h"
+#include "wine/port.h"
 
 #include <assert.h>
 #include <stdarg.h>
-//#include <string.h>
+#include <string.h>
 
 #ifdef HAVE_MPG123_H
 # include <mpg123.h>
@@ -40,16 +40,16 @@
 # endif
 #endif
 
-#include <windef.h>
-#include <winbase.h>
-#include <wingdi.h>
-#include <winuser.h>
-#include <winnls.h>
-//#include "mmsystem.h"
-//#include "mmreg.h"
-//#include "msacm.h"
-#include <msacmdrv.h>
-#include <wine/debug.h>
+#include "windef.h"
+#include "winbase.h"
+#include "wingdi.h"
+#include "winuser.h"
+#include "winnls.h"
+#include "mmsystem.h"
+#include "mmreg.h"
+#include "msacm.h"
+#include "msacmdrv.h"
+#include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(mpeg3);
 
@@ -215,6 +215,7 @@ static void MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
  */
 static	LRESULT	MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 {
+    LRESULT error = MMSYSERR_NOTSUPPORTED;
     AcmMpeg3Data*	aad;
     int err;
 
@@ -238,6 +239,18 @@ static	LRESULT	MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
               adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEG) &&
              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
     {
+        if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
+        {
+            MPEGLAYER3WAVEFORMAT *formatmp3 = (MPEGLAYER3WAVEFORMAT *)adsi->pwfxSrc;
+
+            if (adsi->pwfxSrc->cbSize < MPEGLAYER3_WFX_EXTRA_BYTES ||
+                formatmp3->wID != MPEGLAYER3_ID_MPEG)
+            {
+                error = ACMERR_NOTPOSSIBLE;
+                goto theEnd;
+            }
+        }
+
 	/* resampling or mono <=> stereo not available
          * MPEG3 algo only define 16 bit per sample output
          */
@@ -273,7 +286,7 @@ static	LRESULT	MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
  theEnd:
     HeapFree(GetProcessHeap(), 0, aad);
     adsi->dwDriver = 0L;
-    return MMSYSERR_NOTSUPPORTED;
+    return error;
 }
 
 /***********************************************************************
diff --git a/media/doc/README.WINE b/media/doc/README.WINE
index b4bd2a8c393..41db1497057 100644
--- a/media/doc/README.WINE
+++ b/media/doc/README.WINE
@@ -198,7 +198,7 @@ reactos/dll/win32/wbemdisp            # Synced to WineStaging-3.3
 reactos/dll/win32/wbemprox            # Synced to WineStaging-3.3
 reactos/dll/win32/windowscodecs       # Synced to WineStaging-3.3
 reactos/dll/win32/windowscodecsext    # Synced to WineStaging-2.9
-reactos/dll/win32/winemp3.acm         # Synced to Wine-3.0
+reactos/dll/win32/winemp3.acm         # Synced to WineStaging-3.3
 reactos/dll/win32/wing32              # Synced to WineStaging-2.9
 reactos/dll/win32/winhttp             # Synced to Wine-3.0
 reactos/dll/win32/wininet             # Synced to Wine-3.0