diff --git a/src/cryptography/hazmat/bindings/openssl/bio.py b/src/cryptography/hazmat/bindings/openssl/bio.py
index 854b2bc..d97debb 100644
--- a/src/cryptography/hazmat/bindings/openssl/bio.py
+++ b/src/cryptography/hazmat/bindings/openssl/bio.py
@@ -89,7 +89,7 @@
 """
 
 FUNCTIONS = """
-BIO* BIO_new(BIO_METHOD *);
+BIO *BIO_new(BIO_METHOD *);
 int BIO_set(BIO *, BIO_METHOD *);
 int BIO_free(BIO *);
 void BIO_vfree(BIO *);