diff --git a/src/c_kzg_4844.c b/src/c_kzg_4844.c
index a6372b3..ad48df2 100644
--- a/src/c_kzg_4844.c
+++ b/src/c_kzg_4844.c
@@ -710,6 +710,7 @@ static void free_fft_settings(FFTSettings *fs) {
  * @param ks The settings to be freed
  */
 static void free_kzg_settings(KZGSettings *ks) {
+    free((FFTSettings*)ks->fs);
     free(ks->g1_values);
     free(ks->g2_values);
 }