diff --git a/src/terminal/Tabstops.zig b/src/terminal/Tabstops.zig
index 7e74bc961..fb1d7ae61 100644
--- a/src/terminal/Tabstops.zig
+++ b/src/terminal/Tabstops.zig
@@ -93,13 +93,13 @@ pub fn unset(self: *Tabstops, col: usize) void {
     const i = entry(col);
     const idx = index(col);
     if (i < prealloc_count) {
-        self.prealloc_stops[i] ^= masks[idx];
+        self.prealloc_stops[i] &= ~masks[idx];
         return;
     }
 
     const dynamic_i = i - prealloc_count;
     assert(dynamic_i < self.dynamic_stops.len);
-    self.dynamic_stops[dynamic_i] ^= masks[idx];
+    self.dynamic_stops[dynamic_i] &= ~masks[idx];
 }
 
 /// Get the value of a tabstop at a specific column. The columns are 0-indexed.
@@ -198,6 +198,10 @@ test "Tabstops: basic" {
     try testing.expect(t.get(4));
     t.unset(4);
     try testing.expect(!t.get(4));
+
+    // Unsetting a column with no tabstop should be a no-op, not a toggle.
+    t.unset(4);
+    try testing.expect(!t.get(4));
 }
 
 test "Tabstops: dynamic allocations" {
@@ -214,6 +218,10 @@ test "Tabstops: dynamic allocations" {
     try testing.expect(t.get(cap + 4));
     try testing.expect(!t.get(cap + 3));
 
+    // Unsetting a column with no tabstop should be a no-op, not a toggle.
+    t.unset(cap + 3);
+    try testing.expect(!t.get(cap + 3));
+
     // Growing again preserves existing stops and clears the new unit.
     try t.resize(testing.allocator, cap + unit_bits + 1);
     try testing.expect(t.get(cap + 4));