diff --git a/dlls/xaudio2_7/xapo.c b/dlls/xaudio2_7/xapo.c
index 657d2f3f507..47210f1570e 100644
--- a/dlls/xaudio2_7/xapo.c
+++ b/dlls/xaudio2_7/xapo.c
@@ -311,6 +311,7 @@ static inline HRESULT get_fapo_from_clsid(REFCLSID clsid, FAPO **fapo)
             XAudio_Internal_Free,
             XAudio_Internal_Realloc
         );
+#if XAUDIO2_VER >= 9
     if(IsEqualGUID(clsid, &CLSID_AudioReverb27))
         return FAudioCreateReverb9WithCustomAllocatorEXT(
             fapo,
@@ -319,6 +320,16 @@ static inline HRESULT get_fapo_from_clsid(REFCLSID clsid, FAPO **fapo)
             XAudio_Internal_Free,
             XAudio_Internal_Realloc
         );
+#else
+    if(IsEqualGUID(clsid, &CLSID_AudioReverb27))
+        return FAudioCreateReverbWithCustomAllocatorEXT(
+            fapo,
+            0,
+            XAudio_Internal_Malloc,
+            XAudio_Internal_Free,
+            XAudio_Internal_Realloc
+        );
+#endif
 #endif
 #if XAUDIO2_VER >= 8 || defined XAPOFX1_VER
     if(IsEqualGUID(clsid, &CLSID_FXReverb) ||