diff --git a/phpseclib/Crypt/Blowfish.php b/phpseclib/Crypt/Blowfish.php
index 94552f94..567e37c0 100644
--- a/phpseclib/Crypt/Blowfish.php
+++ b/phpseclib/Crypt/Blowfish.php
@@ -445,7 +445,7 @@ class Blowfish extends Base
             // quoting https://www.openssl.org/news/openssl-3.0-notes.html, OpenSSL 3.0.1
             // "Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2, RC4, RC5, and DES to the legacy provider"
             // in theory openssl_get_cipher_methods() should catch this but, on GitHub Actions, at least, it does not
-            if (version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
+            if (defined('OPENSSL_VERSION_TEXT') && version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
                 return false;
             }
             if (version_compare(PHP_VERSION, '5.3.7') < 0 && $this->key_length != 16) {
diff --git a/phpseclib/Crypt/DES.php b/phpseclib/Crypt/DES.php
index d9244b51..26bd385f 100644
--- a/phpseclib/Crypt/DES.php
+++ b/phpseclib/Crypt/DES.php
@@ -595,7 +595,7 @@ class DES extends Base
                 // quoting https://www.openssl.org/news/openssl-3.0-notes.html, OpenSSL 3.0.1
                 // "Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2, RC4, RC5, and DES to the legacy provider"
                 // in theory openssl_get_cipher_methods() should catch this but, on GitHub Actions, at least, it does not
-                if (version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
+                if (defined('OPENSSL_VERSION_TEXT') && version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
                     return false;
                 }
                 $this->cipher_name_openssl_ecb = 'des-ecb';
diff --git a/phpseclib/Crypt/RC2.php b/phpseclib/Crypt/RC2.php
index 72a15d35..e0511b32 100644
--- a/phpseclib/Crypt/RC2.php
+++ b/phpseclib/Crypt/RC2.php
@@ -276,7 +276,7 @@ class RC2 extends Base
                 // quoting https://www.openssl.org/news/openssl-3.0-notes.html, OpenSSL 3.0.1
                 // "Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2, RC4, RC5, and DES to the legacy provider"
                 // in theory openssl_get_cipher_methods() should catch this but, on GitHub Actions, at least, it does not
-                if (version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
+                if (defined('OPENSSL_VERSION_TEXT') && version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
                     return false;
                 }
                 if ($this->current_key_length != 128 || strlen($this->orig_key) < 16) {
diff --git a/phpseclib/Crypt/RC4.php b/phpseclib/Crypt/RC4.php
index 195d97ee..2e5c0556 100644
--- a/phpseclib/Crypt/RC4.php
+++ b/phpseclib/Crypt/RC4.php
@@ -148,7 +148,7 @@ class RC4 extends Base
             // quoting https://www.openssl.org/news/openssl-3.0-notes.html, OpenSSL 3.0.1
             // "Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2, RC4, RC5, and DES to the legacy provider"
             // in theory openssl_get_cipher_methods() should catch this but, on GitHub Actions, at least, it does not
-            if (version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
+            if (defined('OPENSSL_VERSION_TEXT') && version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) {
                 return false;
             }
             if (version_compare(PHP_VERSION, '5.3.7') >= 0) {