diff --git a/src/build/Function.go b/src/build/Function.go
index 3ec442f..3ba0646 100644
--- a/src/build/Function.go
+++ b/src/build/Function.go
@@ -62,12 +62,6 @@ func (f *Function) Compile() {
 
 		case token.GroupEnd:
 			groupLevel--
-
-		case token.BlockStart:
-			// Add scope
-
-		case token.BlockEnd:
-			// Remove scope
 		}
 	}
 
@@ -129,9 +123,8 @@ func (f *Function) CompileVariableDefinition(expr *expression.Expression) error
 	}
 
 	name := expr.Children[0].Token.Text()
-	_, exists := f.Variables[name]
 
-	if exists {
+	if f.identifierExists(name) {
 		return errors.New(&errors.VariableAlreadyExists{Name: name}, f.File, expr.Children[0].Token.Position)
 	}
 
@@ -161,11 +154,6 @@ func (f *Function) CompileVariableDefinition(expr *expression.Expression) error
 	return nil
 }
 
-func (f *Function) identifierExists(name string) bool {
-	_, exists := f.Variables[name]
-	return exists
-}
-
 // CompileFunctionCall compiles a function call.
 func (f *Function) CompileFunctionCall(expr *expression.Expression) error {
 	funcName := expr.Children[0].Token.Text()
@@ -254,6 +242,12 @@ func (f *Function) String() string {
 	return f.Name
 }
 
+// identifierExists returns true if the identifier has been defined.
+func (f *Function) identifierExists(name string) bool {
+	_, exists := f.Variables[name]
+	return exists
+}
+
 // isVariableDefinition returns true if the expression is a variable definition.
 func isVariableDefinition(expr *expression.Expression) bool {
 	return expr.Token.Kind == token.Operator && expr.Token.Text() == ":="
diff --git a/src/build/scan.go b/src/build/scan.go
index 710e53c..219c132 100644
--- a/src/build/scan.go
+++ b/src/build/scan.go
@@ -176,12 +176,12 @@ func scanFile(path string, functions chan<- *Function) error {
 		for i < len(tokens) {
 			if tokens[i].Kind == token.BlockStart {
 				blockLevel++
+				i++
 
 				if blockLevel == 1 {
 					bodyStart = i
 				}
 
-				i++
 				continue
 			}
 
@@ -225,7 +225,7 @@ func scanFile(path string, functions chan<- *Function) error {
 			Name:      tokens[nameStart].Text(),
 			File:      file,
 			Head:      tokens[paramsStart:bodyStart],
-			Body:      tokens[bodyStart : i+1],
+			Body:      tokens[bodyStart:i],
 			Variables: map[string]*Variable{},
 			CPU: cpu.CPU{
 				General: x64.GeneralRegisters,