diff --git a/src/nouveau/compiler/nak/sm120_instr_latencies.rs b/src/nouveau/compiler/nak/sm120_instr_latencies.rs
index ce16df16c0f..06f63658d5a 100644
--- a/src/nouveau/compiler/nak/sm120_instr_latencies.rs
+++ b/src/nouveau/compiler/nak/sm120_instr_latencies.rs
@@ -428,6 +428,10 @@ impl SM120Latency {
                     || read_latency == RegLatencySM100::Hmma
                 {
                     RegLatencySM100::raw(write_latency, read_latency, false) + 9
+                } else if write_latency == RegLatencySM100::Imma
+                    || read_latency == RegLatencySM100::Imma
+                {
+                    RegLatencySM100::raw(write_latency, read_latency, false) + 5
                 } else {
                     RegLatencySM100::raw(write_latency, read_latency, false) + 1
                 }