diff --git a/include/GFp/base.h b/include/GFp/base.h
index 90746f5d6..6859f3c61 100644
--- a/include/GFp/base.h
+++ b/include/GFp/base.h
@@ -146,6 +146,4 @@
 #endif  // OPENSSL_ASM_INCOMPATIBLE
 
 
-typedef struct bignum_st BIGNUM;
-
 #endif  // OPENSSL_HEADER_BASE_H