diff --git a/src/terminal/sgr.zig b/src/terminal/sgr.zig
index ecec3ed56..9b3dc7a21 100644
--- a/src/terminal/sgr.zig
+++ b/src/terminal/sgr.zig
@@ -225,7 +225,7 @@ pub const Parser = struct {
                         .b = @truncate(rgb[2]),
                     },
                 };
-            } else if (slice.len >= 2 and slice[1] == 5) {
+            } else if (slice.len >= 3 and slice[1] == 5) {
                 self.idx += 2;
                 return Attribute{
                     .@"256_bg" = @truncate(slice[2]),
@@ -538,3 +538,9 @@ test "sgr: direct color fg missing color" {
     var p: Parser = .{ .params = &[_]u16{ 38, 5 }, .colon = false };
     while (p.next()) |_| {}
 }
+
+test "sgr: direct color bg missing color" {
+    // This used to crash
+    var p: Parser = .{ .params = &[_]u16{ 48, 5 }, .colon = false };
+    while (p.next()) |_| {}
+}