diff --git a/fvm/script.go b/fvm/script.go
index 9d173f886cd..038f4d03ebd 100644
--- a/fvm/script.go
+++ b/fvm/script.go
@@ -202,6 +202,11 @@ func (executor *scriptExecutor) executeScript() error {
 
 	chainID := executor.ctx.Chain.ChainID()
 
+	// Setup InternalEVM in both environments because:
+	// - Scripts execute in ScriptRuntimeEnv
+	// - But system contract invocations (e.g., getAccount().balance) use TxRuntimeEnv
+
+	// Setup InternalEVM in ScriptRuntimeEnv (for script execution)
 	err := evm.SetupEnvironment(
 		chainID,
 		executor.env,
@@ -211,6 +216,21 @@ func (executor *scriptExecutor) executeScript() error {
 		return err
 	}
 
+	// Setup InternalEVM in TxRuntimeEnv (for system contract invocations)
+	// This solves the problem where FlowServiceAccount (which imports EVM) needs
+	// InternalEVM to be available during dependency checking when invoked via
+	// system contracts (e.g., getAccount().balance). Without this, type checking
+	// fails with "cannot find variable in this scope: `InternalEVM`" because
+	// system contract invocations use TxRuntimeEnv, not ScriptRuntimeEnv.
+	err = evm.SetupEnvironment(
+		chainID,
+		executor.env,
+		rt.TxRuntimeEnv,
+	)
+	if err != nil {
+		return err
+	}
+
 	value, err := rt.ExecuteScript(
 		runtime.Script{
 			Source:    executor.proc.Script,