diff --git a/etk-asm/src/parse/asm.pest b/etk-asm/src/parse/asm.pest
index 2ddb1770..3547fa19 100644
--- a/etk-asm/src/parse/asm.pest
+++ b/etk-asm/src/parse/asm.pest
@@ -60,7 +60,7 @@ gt = { ">" }
 lt = { "<" }
 gte = { ">=" }
 lte = { "<=" }
-hardfork_name = { string_char* }
+hardfork_name = { ASCII_ALPHA* }
 
 string = @{ "\"" ~ string_char* ~ "\"" }
 string_char = _{ "\\\\" | "\\\"" | (!"\\" ~ !"\"" ~ ANY) }
diff --git a/etk-asm/src/parse/macros.rs b/etk-asm/src/parse/macros.rs
index e02881c7..58fd75eb 100644
--- a/etk-asm/src/parse/macros.rs
+++ b/etk-asm/src/parse/macros.rs
@@ -53,8 +53,8 @@ pub(crate) fn parse_builtin(pair: Pair<Rule>) -> Result<Node, ParseError> {
                 let mut directive = inner.into_inner();
                 let operator = match directive.next() {
                     Some(operator) => {
-                        let operator = operator.as_str().into();
-                        Some(operator)
+                        let op = operator.as_str().into();
+                        Some(op)
                     }
                     None => None,
                 };