diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 0e73822f3..895e55b44 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -336,6 +336,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
 	}
 	app.Before = func(ctx *cli.Context) error {
 		utils.SetupLogger(ctx)
+		utils.SetupVM(ctx)
 		if ctx.GlobalBool(utils.PProfEanbledFlag.Name) {
 			utils.StartPProf(ctx)
 		}
diff --git a/core/vm/settings.go b/core/vm/settings.go
index b94efd9ab..0cd931b6a 100644
--- a/core/vm/settings.go
+++ b/core/vm/settings.go
@@ -17,9 +17,9 @@
 package vm
 
 var (
-	DisableJit  bool // Disable the JIT VM
-	ForceJit    bool // Force the JIT, skip byte VM
-	MaxProgSize int  // Max cache size for JIT Programs
+	DisableJit  bool = true // Disable the JIT VM
+	ForceJit    bool        // Force the JIT, skip byte VM
+	MaxProgSize int         // Max cache size for JIT Programs
 )
 
 const defaultJitMaxCache int = 64