diff --git a/assembler/asm.py b/assembler/asm.py
index e285f7c..83b6378 100755
--- a/assembler/asm.py
+++ b/assembler/asm.py
@@ -1095,6 +1095,7 @@ def segment_bytes(self):
             self.error(
                 f"Unused label(s), try using them in dead code, or commenting them out: {error_text}"
             )
+            has_problem = True
         if has_problem:
             return None
         segment = bytearray(SEGMENT_LENGTH)
diff --git a/vms/connect4/fill_board_with_mod.asm b/vms/connect4/fill_board_with_mod.asm
index 4e06c9a..375244b 100644
--- a/vms/connect4/fill_board_with_mod.asm
+++ b/vms/connect4/fill_board_with_mod.asm
@@ -6,14 +6,14 @@
 lw r1, 0xFF89
 lw r1, r1
 b r1 _move_nonzero # (offset is +0x3)
-.label _move_zero # On move 0, play in column 3.
+# .label _move_zero # On move 0, play in column 3.
 lw r0, 3
 ret
 .label _move_nonzero
 lw r0, 18
 ge r1 r0
 b r0 _move_late # (offset is +0x2)
-.label _move_early # On moves 1-17, play in column (n - 1) % 7.
+# .label _move_early # On moves 1-17, play in column (n - 1) % 7.
 decr r1
 # j _move_late # Surprise optimization: This is a noop, this time!
 .label _move_late # On moves 18-20, play in column n % 7.