diff --git a/cryptography/hazmat/bindings/openssl/rsa.py b/cryptography/hazmat/bindings/openssl/rsa.py
index b6f7d04..359305c 100644
--- a/cryptography/hazmat/bindings/openssl/rsa.py
+++ b/cryptography/hazmat/bindings/openssl/rsa.py
@@ -33,7 +33,10 @@
 static const int RSA_NO_PADDING;
 static const int RSA_PKCS1_OAEP_PADDING;
 static const int RSA_X931_PADDING;
+static const int RSA_PKCS1_PSS_PADDING;
 static const int RSA_F4;
+
+static const int Cryptography_HAS_PSS_PADDING;
 """
 
 FUNCTIONS = """
@@ -70,10 +73,14 @@
 """
 
 CUSTOMIZATIONS = """
-#if OPENSSL_VERSION_NUMBER < 0x10000000
+#if OPENSSL_VERSION_NUMBER >= 0x10000000
+static const long Cryptography_HAS_PSS_PADDING = 1;
+#else
 // see evp.py for the definition of Cryptography_HAS_PKEY_CTX
+static const long Cryptography_HAS_PSS_PADDING = 0;
 int (*EVP_PKEY_CTX_set_rsa_padding)(EVP_PKEY_CTX *, int) = NULL;
 int (*EVP_PKEY_CTX_set_rsa_pss_saltlen)(EVP_PKEY_CTX *, int) = NULL;
+static const long RSA_PKCS1_PSS_PADDING = 0;
 #endif
 """
 
@@ -81,5 +88,8 @@
     "Cryptography_HAS_PKEY_CTX": [
         "EVP_PKEY_CTX_set_rsa_padding",
         "EVP_PKEY_CTX_set_rsa_pss_saltlen",
-    ]
+    ],
+    "Cryptography_HAS_PSS_PADDING": [
+        "RSA_PKCS1_PSS_PADDING",
+    ],
 }