diff --git a/parser/src/ast.rs b/parser/src/ast.rs
index 5a75b81..05bca76 100644
--- a/parser/src/ast.rs
+++ b/parser/src/ast.rs
@@ -115,6 +115,7 @@ pub enum Prefix {
     RefMut,
     Deref,
     New,
+    Not,
 }
 
 #[derive(Debug, Clone, Serialize)]
diff --git a/parser/src/grammar.pest b/parser/src/grammar.pest
index 9bc04cc..9913b8c 100644
--- a/parser/src/grammar.pest
+++ b/parser/src/grammar.pest
@@ -172,12 +172,14 @@ prefix = {
   | mut_ref_px
   | ref_px
   | new_px
+  | not_px
 }
 
 deref_px   = { "*" }
 mut_ref_px = { "&" ~ mutable }
 ref_px     = { "&" }
 new_px     = { "new" }
+not_px     = { "!" }
 
 prefix_list = { prefix* }
 
diff --git a/parser/src/lib.rs b/parser/src/lib.rs
index d4e2c27..bb3f16d 100644
--- a/parser/src/lib.rs
+++ b/parser/src/lib.rs
@@ -403,6 +403,7 @@ impl From<pest::iterators::Pair<'_, Rule>> for Prefix {
             Rule::mut_ref_px => Self::RefMut,
             Rule::ref_px => Self::Ref,
             Rule::new_px => Self::New,
+            Rule::not_px => Self::Not,
             _ => unimplemented!("{pair:#?}"),
         }
     }
diff --git a/src/codegen.rs b/src/codegen.rs
index 463e448..6bfa172 100644
--- a/src/codegen.rs
+++ b/src/codegen.rs
@@ -164,6 +164,7 @@ impl GetRust for Prefix {
             Self::Deref => "*",
             Self::Ref => "&",
             Self::RefMut => "&mut ",
+            Self::Not => "!",
             Self::New => "",
         }
         .to_string()