diff --git a/simd/cmd/root.go b/simd/cmd/root.go
index 30356d3ed53..ebb69b47c54 100644
--- a/simd/cmd/root.go
+++ b/simd/cmd/root.go
@@ -47,7 +47,7 @@ func NewRootCmd() (*cobra.Command, params.EncodingConfig) {
 		WithAccountRetriever(types.AccountRetriever{}).
 		WithBroadcastMode(flags.BroadcastBlock).
 		WithHomeDir(simapp.DefaultNodeHome).
-		WithViper()
+		WithViper("") // In simapp, we don't use any prefix for env variables.
 
 	rootCmd := &cobra.Command{
 		Use:   "simd",