diff --git a/crypto/x509/by_store.c b/crypto/x509/by_store.c
index d84ad2f66ee84..1474474a2d1e9 100644
--- a/crypto/x509/by_store.c
+++ b/crypto/x509/by_store.c
@@ -122,7 +122,7 @@ static int by_store_ctrl_ex(X509_LOOKUP *ctx, int cmd, const char *argp,
                 uris = sk_OPENSSL_STRING_new_null();
                 X509_LOOKUP_set_method_data(ctx, uris);
             }
-            if (!sk_OPENSSL_STRING_push(uris, data)) {
+            if (sk_OPENSSL_STRING_push(uris, data) <= 0) {
                 OPENSSL_free(data);
                 return 0;
             }
diff --git a/test/evp_test.c b/test/evp_test.c
index 2de31ef06ba98..4ca11f58290b8 100644
--- a/test/evp_test.c
+++ b/test/evp_test.c
@@ -203,7 +203,7 @@ static int ctrladd(STACK_OF(OPENSSL_STRING) *controls, const char *value)
     if (data == NULL)
         return -1;
 
-    if (!sk_OPENSSL_STRING_push(controls, data)) {
+    if (sk_OPENSSL_STRING_push(controls, data) <= 0) {
         OPENSSL_free(data);
         return -1;
     }