diff --git a/src/ast.rs b/src/ast.rs
index 616ab90..802eaf2 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -267,6 +267,7 @@ pub enum UnOp {
     Not,
     Ref,
     Deref,
+    PreInc
 }
 
 #[derive(Debug, Clone)]
diff --git a/src/c_ir.rs b/src/c_ir.rs
index dbe85d4..a132d42 100644
--- a/src/c_ir.rs
+++ b/src/c_ir.rs
@@ -122,6 +122,7 @@ pub enum CUnaryOp {
     Not,
     Ref,
     Deref,
+    PreInc
 }
 
 impl CUnaryOp {
@@ -131,6 +132,7 @@ impl CUnaryOp {
             CUnaryOp::Not => "!",
             CUnaryOp::Ref => "&",
             CUnaryOp::Deref => "*",
+            CUnaryOp::PreInc => "++"
         }
     }
 }