diff --git a/src/parse.rs b/src/parse.rs
index dd75844..530bd6f 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -13,6 +13,8 @@ enum Error {
     NumberParsing(String, ParseFloatError),
 }
 
+const PREC: u32 = 512;
+
 #[derive(Clone, Debug, PartialEq)]
 enum Node {
     Function(Function),
@@ -96,7 +98,7 @@ fn nodes_from_str(s: &str) -> Result<Vec<Node>, Error> {
                             .map_err(|e| {
                                 Error::NumberParsing(filtered_string[start_index..i].to_owned(), e)
                             })?
-                            .complete(512),
+                            .complete(PREC),
                     ));
 
                     state = ParsingState::Start;
@@ -138,7 +140,7 @@ fn nodes_from_str(s: &str) -> Result<Vec<Node>, Error> {
                     .map_err(|e| {
                         Error::NumberParsing(filtered_string[start_index..i].to_owned(), e)
                     })?
-                    .complete(512),
+                    .complete(PREC),
             ));
         }
     }
@@ -153,10 +155,10 @@ fn test_nodes_from_str() {
         &[
             Node::Function(Function::Sine),
             Node::ParenthesisStart,
-            Node::Number(Float::with_val(512, 2)),
+            Node::Number(Float::with_val(PREC, 2)),
             Node::ParenthesisEnd,
             Node::Operator(Operator::Plus),
-            Node::Number(Float::with_val(512, 1))
+            Node::Number(Float::with_val(PREC, 1))
         ],
     )
 }