diff --git a/apps/pcmbuf.c b/apps/pcmbuf.c
index 03a5752e9d..6aa01a8a13 100644
--- a/apps/pcmbuf.c
+++ b/apps/pcmbuf.c
@@ -39,7 +39,8 @@
 #include "thread.h"
 
 /* Define PCMBUF_MUTING if the codec requires muting to prevent pops */
-#if !defined(HAVE_UDA1380) && !defined(HAVE_TLV320) && !defined(HAVE_AS3514)
+#if !defined(HAVE_UDA1380) && !defined(HAVE_TLV320) && !defined(HAVE_AS3514) \
+    && !defined(HAVE_WM8978)
 #define PCMBUF_MUTING
 #endif