diff --git a/dlls/msacm/filter.c b/dlls/msacm/filter.c
index 40e6d414fcd..02044c99a51 100644
--- a/dlls/msacm/filter.c
+++ b/dlls/msacm/filter.c
@@ -230,8 +230,9 @@ MMRESULT WINAPI acmFilterEnumW(HACMDRIVER had, PACMFILTERDETAILSW pafd,
 
 	if (acmDriverID(had, &hadid, 0) != MMSYSERR_NOERROR)
 	    return MMSYSERR_INVALHANDLE;
-	return MSACM_FilterEnumHelper(MSACM_GetDriverID(hadid), had, pafd,
-				      fnCallback, dwInstance, fdwEnum);
+	MSACM_FilterEnumHelper(MSACM_GetDriverID(hadid), had, pafd,
+			       fnCallback, dwInstance, fdwEnum);
+	return MMSYSERR_NOERROR;
     }
     for (padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID) {
 	    /* should check for codec only */
diff --git a/dlls/msacm/format.c b/dlls/msacm/format.c
index 716d588f836..fc47b051907 100644
--- a/dlls/msacm/format.c
+++ b/dlls/msacm/format.c
@@ -498,8 +498,9 @@ MMRESULT WINAPI acmFormatEnumW(HACMDRIVER had, PACMFORMATDETAILSW pafd,
 
 	if (acmDriverID(had, &hadid, 0) != MMSYSERR_NOERROR)
 	    return MMSYSERR_INVALHANDLE;
-	return MSACM_FormatEnumHelper(MSACM_GetDriverID(hadid), had, pafd, &wfxRef, 
-				      fnCallback, dwInstance, fdwEnum);
+	MSACM_FormatEnumHelper(MSACM_GetDriverID(hadid), had, pafd, &wfxRef, 
+			       fnCallback, dwInstance, fdwEnum);
+	return MMSYSERR_NOERROR;
     }
     for (padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID) {
 	    /* should check for codec only */