diff --git a/desmume/src/SPU.c b/desmume/src/SPU.c
index 6ef38a52a..2e140da83 100644
--- a/desmume/src/SPU.c
+++ b/desmume/src/SPU.c
@@ -140,6 +140,8 @@ int SPU_Init(int coreid, int buffersize)
    if ((SPU = (SPU_struct *)malloc(sizeof(SPU_struct))) == NULL)
       return -1;
 
+   memset((void *)SPU, 0, sizeof(SPU_struct));
+
    SPU_Reset();
 
    return SPU_ChangeSoundCore(coreid, buffersize);