diff --git a/yubihsm-shell-2.0.0-gcc9.patch b/yubihsm-shell-2.0.0-gcc9.patch
index 71d5898..48b5ddc 100644
--- a/yubihsm-shell-2.0.0-gcc9.patch
+++ b/yubihsm-shell-2.0.0-gcc9.patch
@@ -1,6 +1,6 @@
 diff -up yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c.gcc9 yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c
 --- yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c.gcc9	2019-02-13 14:40:19.972274817 +0100
-+++ yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c	2019-02-13 14:40:54.957601833 +0100
++++ yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c	2019-02-13 14:56:04.310083669 +0100
 @@ -365,7 +365,10 @@ static bool test_ecdh_value(const char *
    }
  
@@ -21,7 +21,7 @@ diff -up yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c.gcc9 yubihsm-shell-
    if (!equal) {
      fail("ECDH keys derived with yubi library and with openssl do not have the "
           "same value");
-@@ -416,7 +420,11 @@ static bool test_dublicate_ecdh(const ch
+@@ -416,7 +420,12 @@ static bool test_dublicate_ecdh(const ch
      return false;
    }
  
@@ -29,8 +29,18 @@ diff -up yubihsm-shell-2.0.0/pkcs11/tests/ecdh_derive_test.c.gcc9 yubihsm-shell-
 +  unsigned char *ecdh1_value = malloc(ecdh1_len);
 +  unsigned char *ecdh2_value = malloc(ecdh2_len);
 +  if (ecdh1_value == NULL || ecdh2_value == NULL) {
++    free(ecdh1_value);
 +    return false;
 +  }
    if (get_yhvalue(*ecdh2, ecdh1_value, ecdh1_len) == 0) {
      return false;
    }
+@@ -431,6 +440,8 @@ static bool test_dublicate_ecdh(const ch
+       break;
+     }
+   }
++  free(ecdh1_value);
++  free(ecdh2_value);
+   if (!equal) {
+     fail(
+       "ECDH keys derived from the same base keys do not have the same value");