diff --git a/challenger/challenger.go b/challenger/challenger.go
index 008b6f7..20da42a 100644
--- a/challenger/challenger.go
+++ b/challenger/challenger.go
@@ -111,7 +111,7 @@ func (c *Chip) GetExtensionChallenge() gl.QuadraticExtensionVariable {
 }
 
 func (c *Chip) GetHash() poseidon.GoldilocksHashOut {
-	return [4]gl.Variable{c.GetChallenge(), c.GetChallenge(), c.GetChallenge(), c.GetChallenge()}
+	return [poseidon.POSEIDON_GL_HASH_SIZE]gl.Variable{c.GetChallenge(), c.GetChallenge(), c.GetChallenge(), c.GetChallenge()}
 }
 
 func (c *Chip) GetFriChallenges(
diff --git a/poseidon/goldilocks.go b/poseidon/goldilocks.go
index 68128f0..7fe658c 100644
--- a/poseidon/goldilocks.go
+++ b/poseidon/goldilocks.go
@@ -9,10 +9,11 @@ const HALF_N_FULL_ROUNDS = 4
 const N_PARTIAL_ROUNDS = 22
 const SPONGE_WIDTH = 12
 const SPONGE_RATE = 8
+const POSEIDON_GL_HASH_SIZE = 4
 
 type GoldilocksState = [SPONGE_WIDTH]gl.Variable
 type GoldilocksStateExtension = [SPONGE_WIDTH]gl.QuadraticExtensionVariable
-type GoldilocksHashOut = [4]gl.Variable
+type GoldilocksHashOut = [POSEIDON_GL_HASH_SIZE]gl.Variable
 
 type GoldilocksChip struct {
 	api frontend.API `gnark:"-"`