diff --git a/zig/src/families/glm/backend.zig b/zig/src/families/glm/backend.zig
index cd3442d33c..ba96a256fb 100644
--- a/zig/src/families/glm/backend.zig
+++ b/zig/src/families/glm/backend.zig
@@ -17,6 +17,8 @@ const fwd = @import("forward.zig");
 /// One stream's window and a shared forward's rows, ms on one M5 Ultra (a pair times its own at load: timing.zig).
 const one_mac_window_costs = costTable(13.0, 4.1);
 const one_mac_shared_costs = costTable(8.4 + 4.1, 4.1);
+/// The acceptance estimates' rate, below the core's 0.15: a stream takes about twice the misses in a row to go plain.
+const depth_rate = 0.08;
 
 fn costTable(comptime one: f64, comptime row: f64) [st.max_rows]lanes.config.Cost {
     var c: [st.max_rows]lanes.config.Cost = undefined;
@@ -61,7 +63,7 @@ pub const Backend = struct {
             .drafts = 4,
             .window_costs = if (b.costs) |*c| &c.window else if (b.sl.e.ep == null) &one_mac_window_costs else &.{},
             .mtp_step_ms = if (b.costs) |c| c.head_ms else 1.3,
-            .depth_rate = if (b.costs != null) timing.depth_rate else 0,
+            .depth_rate = depth_rate,
             .streams_exact = true,
             .hidden_rows = true,
             .batch_rows = st.max_rows,
diff --git a/zig/src/families/glm/timing.zig b/zig/src/families/glm/timing.zig
index 186c6aac24..fc0716bd70 100644
--- a/zig/src/families/glm/timing.zig
+++ b/zig/src/families/glm/timing.zig
@@ -18,8 +18,6 @@ const room = 112;
 const warm = 6;
 /// Head chains of 1 and 8 levels: their difference over 7 is a level's ms.
 const levels = [2]u32{ 1, 8 };
-/// Depths priced at timed costs sit within a few percent: the acceptance estimates move slower so noise picks no depth.
-pub const depth_rate = 0.08;
 
 /// The depth rule's costs: timed now (both Macs time, rank 0 keeps them) or kept from an earlier load of this build.
 pub fn measure(sl: *Slots, gpa: std.mem.Allocator, io: std.Io) !?Costs {