diff --git a/tests/unit/test_p5_multitile.cu b/tests/unit/test_p5_multitile.cu
index c10d4a2d..9f475be7 100644
--- a/tests/unit/test_p5_multitile.cu
+++ b/tests/unit/test_p5_multitile.cu
@@ -53,7 +53,7 @@ void reference_attention(
 int main() {
     constexpr int HD = 64;
     constexpr int SK = 256;  // 2 KV tiles
-    constexpr float SCALE = 1.0f / sqrtf((float)HD);
+    const float SCALE = 1.0f / sqrtf((float)HD);
 
     // Allocate host data
     bf16_t h_q[HD], h_k[SK * HD], h_v[HD * SK];