1 files changed, 4 insertions, 0 deletions
diff --git a/src/codegen.c b/src/codegen.c
index 34f6c23..f02a38c 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -87,6 +87,10 @@ static void codegen_unary_expr(CodeGen* g, AstNode* ast) {
         fprintf(g->out, "  sete al\n");
         fprintf(g->out, "  movzb rax, al\n");
         fprintf(g->out, "  push rax\n");
+    } else if (ast->node_op == TokenKind_tilde) {
+        fprintf(g->out, "  pop rax\n");
+        fprintf(g->out, "  not rax\n");
+        fprintf(g->out, "  push rax\n");
     } else {
         unreachable();
     }