diff --git a/src/elements/command/simple.rs b/src/elements/command/simple.rs
index e95863ca..3e79a7dd 100644
--- a/src/elements/command/simple.rs
+++ b/src/elements/command/simple.rs
@@ -30,12 +30,12 @@ pub struct SimpleCommand {
 
 impl Command for SimpleCommand {
     fn exec(&mut self, core: &mut ShellCore, pipe: &mut Pipe) -> Option<Pid> {
-        if self.words.len() == 0 {
-            return None;
-        }
+        self.args = self.words.iter()
+                    .filter(|w| w.text != "")
+                    .map(|w| w.text.clone()).collect();
 
-        for a in &mut self.words {
-            self.args.extend(a.get_args());
+        if self.args.len() == 0 {
+            return None;
         }
 
         if self.force_fork 
diff --git a/src/elements/subword.rs b/src/elements/subword.rs
index a9b3fe3f..f360b2a9 100644
--- a/src/elements/subword.rs
+++ b/src/elements/subword.rs
@@ -18,7 +18,6 @@ impl Debug for dyn Subword {
 
 pub trait Subword {
     fn get_text(&self) -> String;
-    fn eval(&mut self) -> Vec<Vec<String>>;
 }
 
 pub fn parse(feeder: &mut Feeder, core: &mut ShellCore) -> Option<Box<dyn Subword>> {
diff --git a/src/elements/subword/brace.rs b/src/elements/subword/brace.rs
index c4f6c14a..95ad4713 100644
--- a/src/elements/subword/brace.rs
+++ b/src/elements/subword/brace.rs
@@ -13,7 +13,6 @@ pub struct BraceSubword {
 
 impl Subword for BraceSubword {
     fn get_text(&self) -> String { self.text.clone() }
-    fn eval(&mut self) -> Vec<Vec<String>> { vec![vec![self.text.clone()]] }
 }
 
 impl BraceSubword {
diff --git a/src/elements/subword/unquoted.rs b/src/elements/subword/unquoted.rs
index 4a86be7d..e4e91bcc 100644
--- a/src/elements/subword/unquoted.rs
+++ b/src/elements/subword/unquoted.rs
@@ -11,7 +11,6 @@ pub struct UnquotedSubword {
 
 impl Subword for UnquotedSubword {
     fn get_text(&self) -> String { self.text.clone() }
-    fn eval(&mut self) -> Vec<Vec<String>> { vec![vec![self.text.clone()]] }
 }
 
 impl UnquotedSubword {
diff --git a/src/elements/word.rs b/src/elements/word.rs
index 5704917c..bca0153e 100644
--- a/src/elements/word.rs
+++ b/src/elements/word.rs
@@ -12,17 +12,13 @@ pub struct Word {
 }
 
 impl Word {
-    fn new() -> Word {
+    pub fn new() -> Word {
         Word {
             text: String::new(),
             subwords: vec![],
         }
     }
 
-    pub fn get_args(&mut self) -> Vec<String> {
-        vec![self.text.clone()]
-    }
-
     pub fn parse(feeder: &mut Feeder, core: &mut ShellCore) -> Option<Word> {
         let mut ans = Word::new();
         while let Some(sw) = subword::parse(feeder, core) {