diff --git a/lib/rbcodec/dsp/pbe.c b/lib/rbcodec/dsp/pbe.c
index 28cdbb2084..3656f687fd 100644
--- a/lib/rbcodec/dsp/pbe.c
+++ b/lib/rbcodec/dsp/pbe.c
@@ -80,7 +80,8 @@ static void dsp_pbe_flush(void)
         return; /* Not currently enabled */
 
     unsigned int total_len = (B0_SIZE + B2_SIZE + B3_SIZE) * 2;
-    memset(core_get_data(handle),0,sizeof(int32_t) * total_len);
+    if (handle > 0)
+        memset(core_get_data(handle),0,sizeof(int32_t) * total_len);
     b0_r[0] = 0; b0_w[0] = 0;
     b0_r[1] = 0; b0_w[1] = 0;
     b2_r[0] = 0; b2_w[0] = 0;
diff --git a/lib/rbcodec/dsp/surround.c b/lib/rbcodec/dsp/surround.c
index 26d12b1952..b2995de49f 100644
--- a/lib/rbcodec/dsp/surround.c
+++ b/lib/rbcodec/dsp/surround.c
@@ -97,7 +97,8 @@ static void dsp_surround_flush(void)
         return;
 
     unsigned int total_len = B0_DLY + B2_DLY + BB_DLY + HH_DLY + CL_DLY;
-    memset(core_get_data(handle),0,sizeof(int32_t) * total_len);
+    if (handle > 0)
+        memset(core_get_data(handle),0,sizeof(int32_t) * total_len);
 }
 
 static void surround_update_filter(unsigned int fout)