diff --git a/src/new_scanner.zig b/src/new_scanner.zig
index f19b8a3..b2005f7 100644
--- a/src/new_scanner.zig
+++ b/src/new_scanner.zig
@@ -79,7 +79,7 @@ pub const Scanner = struct {
 
     fn peekNext(self: *Scanner) u8 {
         if (self.isAtEnd()) return 0;
-        return self.source[self.current + 1];
+        return self.source[self.current - 1];
     }
 
     fn skipWhitespace(self: *Scanner) void {