diff --git a/whisper/whisperv6/api.go b/whisper/whisperv6/api.go
index 0e8490b419..f11e8b6dca 100644
--- a/whisper/whisperv6/api.go
+++ b/whisper/whisperv6/api.go
@@ -113,17 +113,29 @@ func (api *PublicWhisperAPI) Info(ctx context.Context) Info {
 // SetMaxMessageSize sets the maximum message size that is accepted.
 // Upper limit is defined by MaxMessageSize.
 func (api *PublicWhisperAPI) SetMaxMessageSize(ctx context.Context, size uint32) (bool, error) {
-	return true, api.w.SetMaxMessageSize(size)
+	err := api.w.SetMaxMessageSize(size)
+	if err != nil {
+		return false, err
+	}
+	return true, nil
 }
 
 // SetMinPow sets the minimum PoW, and notifies the peers.
 func (api *PublicWhisperAPI) SetMinPoW(ctx context.Context, pow float64) (bool, error) {
-	return true, api.w.SetMinimumPoW(pow)
+	err := api.w.SetMinimumPoW(pow)
+	if err != nil {
+		return false, err
+	}
+	return true, nil
 }
 
 // SetBloomFilter sets the new value of bloom filter, and notifies the peers.
 func (api *PublicWhisperAPI) SetBloomFilter(ctx context.Context, bloom hexutil.Bytes) (bool, error) {
-	return true, api.w.SetBloomFilter(bloom)
+	err := api.w.SetBloomFilter(bloom)
+	if err != nil {
+		return false, err
+	}
+	return true, nil
 }
 
 // MarkTrustedPeer marks a peer trusted, which will allow it to send historic (expired) messages.