diff --git a/dsl/src/dsl_provide.rs b/dsl/src/dsl_provide.rs
index cbd99ff..639fddf 100644
--- a/dsl/src/dsl_provide.rs
+++ b/dsl/src/dsl_provide.rs
@@ -1,34 +1,34 @@
 use crate::*;
 
 pub trait Dsl<Type> {
-    fn take <'source> (&self, token: &mut TokenIter<'source>) -> Perhaps<Type>;
+    fn take <'source> (&self, words: &mut TokenIter<'source>) -> Perhaps<Type>;
     fn take_or_fail <'source> (
-        &self, token: &mut TokenIter<'source>, error: impl Into<Box<dyn std::error::Error>>
+        &self, words: &mut TokenIter<'source>, error: impl Into<Box<dyn std::error::Error>>
     ) -> Usually<Type> {
-        if let Some(value) = Dsl::<Type>::take(self, token)? {
+        if let Some(value) = Dsl::<Type>::take(self, words)? {
             Ok(value)
         } else {
-            Result::Err(error.into())
+            Result::Err(format!("{}: {:?}", error.into(), words.peek().map(|x|x.value)).into())
         }
     }
 }
 
 impl<Type: Namespace<State>, State> Dsl<Type> for State {
-    fn take <'source> (&self, token: &mut TokenIter<'source>) -> Perhaps<Type> {
-        Namespace::take_from(self, token)
+    fn take <'source> (&self, words: &mut TokenIter<'source>) -> Perhaps<Type> {
+        Namespace::take_from(self, words)
     }
 }
 
 pub trait Namespace<State>: Sized {
-    fn take_from <'source> (state: &State, token: &mut TokenIter<'source>)
+    fn take_from <'source> (state: &State, words: &mut TokenIter<'source>)
         -> Perhaps<Self>;
     fn take_from_or_fail <'source> (
-        state: &State, token: &mut TokenIter<'source>, error: impl Into<Box<dyn std::error::Error>>
+        state: &State, words: &mut TokenIter<'source>, error: impl Into<Box<dyn std::error::Error>>
     ) -> Usually<Self> {
-        if let Some(value) = Namespace::<State>::take_from(state, token)? {
+        if let Some(value) = Namespace::<State>::take_from(state, words)? {
             Ok(value)
         } else {
-            Result::Err(error.into())
+            Result::Err(format!("{}: {:?}", error.into(), words.peek().map(|x|x.value)).into())
         }
     }
 }