diff --git a/sunscreen_tfhe/src/params.rs b/sunscreen_tfhe/src/params.rs
index 11421de73..33c92f5f5 100644
--- a/sunscreen_tfhe/src/params.rs
+++ b/sunscreen_tfhe/src/params.rs
@@ -220,6 +220,15 @@ pub const LWE_512_128: LweDef = LweDef {
     std: Stddev(0.0004899836456140595),
 };
 
+/// 128-bit secure parameters for a GLWE instance with 5 polynomials of degree 256.
+pub const GLWE_5_256_128: GlweDef = GlweDef {
+    dim: GlweDimension {
+        size: GlweSize(5),
+        polynomial_degree: PolynomialDegree(256),
+    },
+    std: Stddev(5e-10),
+};
+
 /// 128-bit secure parameters for a GLWE instance with 1 polynomial of degree 1024.
 pub const GLWE_1_1024_128: GlweDef = GlweDef {
     dim: GlweDimension {