diff --git a/src/tokenize.zig b/src/tokenize.zig
index 401401df19149991c5f5669bdf3200cefd4a7dbc..1234b52b58330f9e8d350265f7b69235158d99a9 100644
--- a/src/tokenize.zig
+++ b/src/tokenize.zig
@@ -34,7 +34,7 @@ pub fn do(comptime input: string, comptime symbols: []const u8) []const Token {
 
         blk: {
             if (mode == 0) {
-                if (c == '#') {
+                if (c == '/' and input[i + 1] == '/') {
                     mode = 1;
                     shouldFlush = false;
                     break :blk;