diff --git a/simapp/simd/cmd/root.go b/simapp/simd/cmd/root.go
index fb1493aa8dd8..a392ec87216f 100644
--- a/simapp/simd/cmd/root.go
+++ b/simapp/simd/cmd/root.go
@@ -146,7 +146,7 @@ func initAppConfig() (string, interface{}) {
 	}
 
 	type CustomAppConfig struct {
-		serverconfig.Config
+		serverconfig.Config `mapstructure:",squash"`
 
 		WASM WASMConfig `mapstructure:"wasm"`
 	}
diff --git a/simapp/simd/cmd/root_v2.go b/simapp/simd/cmd/root_v2.go
index e73a653939e8..72f5dff29d73 100644
--- a/simapp/simd/cmd/root_v2.go
+++ b/simapp/simd/cmd/root_v2.go
@@ -156,7 +156,7 @@ func initAppConfig() (string, interface{}) {
 	}
 
 	type CustomAppConfig struct {
-		serverconfig.Config
+		serverconfig.Config `mapstructure:",squash"`
 
 		WASM WASMConfig `mapstructure:"wasm"`
 	}