diff --git a/filter_parser/src/condition.rs b/filter_parser/src/condition.rs
index faacceb72..b58a9f9f9 100644
--- a/filter_parser/src/condition.rs
+++ b/filter_parser/src/condition.rs
@@ -43,9 +43,8 @@ impl<'a> Condition<'a> {
 /// condition      = value ("==" | ">" ...) value
 pub fn parse_condition(input: Span) -> IResult<FilterCondition> {
     let operator = alt((tag("<="), tag(">="), tag("!="), tag("<"), tag(">"), tag("=")));
-    let (input, (key, op, value)) = tuple((|c| parse_value(c), operator, cut(parse_value)))(input)?;
+    let (input, (fid, op, value)) = tuple((parse_value, operator, cut(parse_value)))(input)?;
 
-    let fid = key;
 
     match *op.fragment() {
         "=" => {
@@ -73,7 +72,7 @@ pub fn parse_condition(input: Span) -> IResult<FilterCondition> {
 /// to             = value value TO value
 pub fn parse_to(input: Span) -> IResult<FilterCondition> {
     let (input, (key, from, _, to)) =
-        tuple((|c| parse_value(c), |c| parse_value(c), tag("TO"), cut(parse_value)))(input)?;
+        tuple((parse_value, parse_value, tag("TO"), cut(parse_value)))(input)?;
 
     Ok((
         input,
diff --git a/filter_parser/src/value.rs b/filter_parser/src/value.rs
index 4c769fe5f..d82eda008 100644
--- a/filter_parser/src/value.rs
+++ b/filter_parser/src/value.rs
@@ -28,9 +28,9 @@ pub fn parse_value(input: Span) -> IResult<Token> {
     }
 
     // singleQuoted   = "'" .* all but quotes "'"
-    let simple_quoted = |input| take_till(|c: char| c == '\'')(input);
+    let simple_quoted = take_till(|c: char| c == '\'');
     // doubleQuoted   = "\"" (word | spaces)* "\""
-    let double_quoted = |input| take_till(|c: char| c == '"')(input);
+    let double_quoted = take_till(|c: char| c == '"');
     // word           = (alphanumeric | _ | - | .)+
     let word = take_while1(is_key_component);