diff --git a/crypto_kem/newhope1024cca/clean/poly.c b/crypto_kem/newhope1024cca/clean/poly.c
index 10ec5535..efa8fbb5 100644
--- a/crypto_kem/newhope1024cca/clean/poly.c
+++ b/crypto_kem/newhope1024cca/clean/poly.c
@@ -225,6 +225,7 @@ void PQCLEAN_NEWHOPE1024CCA_CLEAN_poly_uniform(poly *a, const unsigned char *see
                 }
             }
         }
+        shake128_ctx_release(&state);
     }
 }
 
diff --git a/crypto_kem/newhope1024cpa/clean/poly.c b/crypto_kem/newhope1024cpa/clean/poly.c
index f9b4cce8..3f64de42 100644
--- a/crypto_kem/newhope1024cpa/clean/poly.c
+++ b/crypto_kem/newhope1024cpa/clean/poly.c
@@ -225,6 +225,7 @@ void PQCLEAN_NEWHOPE1024CPA_CLEAN_poly_uniform(poly *a, const unsigned char *see
                 }
             }
         }
+        shake128_ctx_release(&state);
     }
 }
 
diff --git a/crypto_kem/newhope512cca/clean/poly.c b/crypto_kem/newhope512cca/clean/poly.c
index aa3175f0..39ec8e59 100644
--- a/crypto_kem/newhope512cca/clean/poly.c
+++ b/crypto_kem/newhope512cca/clean/poly.c
@@ -221,6 +221,7 @@ void PQCLEAN_NEWHOPE512CCA_CLEAN_poly_uniform(poly *a, const unsigned char *seed
                 }
             }
         }
+        shake128_ctx_release(&state);
     }
 }
 
diff --git a/crypto_kem/newhope512cpa/clean/poly.c b/crypto_kem/newhope512cpa/clean/poly.c
index 6bd47ae6..3f03fdcf 100644
--- a/crypto_kem/newhope512cpa/clean/poly.c
+++ b/crypto_kem/newhope512cpa/clean/poly.c
@@ -221,6 +221,7 @@ void PQCLEAN_NEWHOPE512CPA_CLEAN_poly_uniform(poly *a, const unsigned char *seed
                 }
             }
         }
+        shake128_ctx_release(&state);
     }
 }